physics review test

8/17/2019 Physics Review Test

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TEST NAME: Physics Review

TEST ID: 1047108

GRADE: 07 - Seventh Grade

SUBJECT: Life and Physical Sciences

TEST CATEGORY: School Assessment

Physics Review Page 1 of


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Student:

Class:

Date:

1. Arturo ran a 3,000-meter race. His running time from start to finish was 10 minutes. What was

Arturo’s average speed?

A. 5 m/s

B. 5 0 m /sC. 100 m/s

D. 300 m/s

2. Alex is writing down notes as he watches his friend Carla in a bicycle race. He makes the

following notes.

Which notes show that Carla’s bicycle is in motion?

A. 1, 2, and 5

B. 1, 2, and 3

C. 2, 3, and 5

D. 2, 3, and 4

3. An airplane flies in a straight line between two cities that are separated by 840 kilometers. If it

takes 4 hours for the airplane to make the trip, what is its average speed?

A. 84 km/h

B. 105 km/h

C. 180 km/h

D. 210 km/h

4. In a rubber duck race, the winning duck traveled 300 meters in 10 minutes. What was the duck’s

average speed?

A. 0.5 m/s

B. 1.0 m/s

C. 7.5 m/s

D. 3 0 m /s



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5. Rowing a boat forward requires a force that will overcome friction from water and wind. Which

factor most helps overcome the forces working against the boat?

A. the length of the boat

B. the height of sides of the boat

C. the weight of the rowers in the boat

D. the number of people rowing in the boat

6. An object is being subjected to four forces as shown.

What is the magnitude of the net force acting on the object?

A. x

B. 2 x

C. 3 x

D. 9 x

7. Max pushed and released a toy dump truck on a flat sidewalk. The truck traveled for a long

distance and stopped when it hit a wall. Which best explains why the truck traveled the longdistance to the wall?

A. The truck had inertia due to its mass.

B. Gravity pulled the truck to the wall.

C. Magnetism pulled the truck to the wall.

D. The sidewalk applied friction to the truck.

8. The best example of balanced forces is a

A. car incre asing speed.

B. bus parked in a garage.

C. ball kicked along a flat surface.

D. roller coaster slowing down on an incline.



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9. The diagram of a block is shown below.

If placed on a table, what is the net normal force of the block?

A. 3 N

B. 4 N

C. 6 N

D. 8 N

10. A student concludes that no forces are being applied to a laboratory cart that is moving at a

constant velocity. Which statement best explains why the student’s conclusion is incorrect?

A. The cart must be subjected to a net force to continue moving at the same speed.

B. The direction of the cart is changed after unbalanced forces are applied.

C. The cart is subjected to an applied force that cancels the effect of friction.

D. The net force on the cart must be in the direction of motion to overcome friction.

11. Which is an example of balanced forces?

A. a door starting to open

B. a basketball being held

C. a truck beginning to accelerate

D. a book falling off a table

12. When the first American astronauts were planning to walk on the Moon, they knew that the

gravity on the Moon was less than the gravity on Earth. With this information, what did the

astronauts expect to be most different on the Moon?

A. the ir mas s

B. their height

C. their weight

D. their volume

13. Isaac Newton discovered the three laws of motion. Which example best illustrates

Newton's third law of motion, which describes action and reaction forces?

A. a rocket takes off from the ground

B. a book slides forward on a seat when the car stops

C. a heavier ball falls at the same speed as a lighter ball

D. a vehicle rounds a curve and changes its acceleration



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14. The box is being pushed to the right with a force of 300 newtons, and to the left with a force

of 400 newtons.

Which is the net force on the box?

A. 300 newt ons

B. 400 newtons

C. 700 newtons

D. 100 newtons

15. Marisa and Dakota were investigating air friction. Marisa dropped a ball, a pen, a sweatshirt,

and a flat sheet of paper from the same height. Dakota recorded the amount of time it took each

object to reach the ground. Which object most likely took the longest amount of time to reach

the ground?

A. the pen

B. the ball

C. the sweatshirt

D. the sheet of paper

16. A student reads his paper on friction to the class. Which statement should he include in his

paper if he wants to present accurate information?

A. Friction increas es mechanical advantage.

B. Friction opposes the direction of movement.

C. Friction makes movement of an object easier.

D. Friction reduces the amount of work used to move an object.

17. All of the forces acting on a helicopter are balanced.

The reduction of which force would cause the helicopter to drop in altitude?

A. lift

B. d ra g

C. thrust

D. weight



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18. Four students went on a 3-kilomater hike. Each student was hiking a different speed. The

distance the students hiked during the first 30 minutes is shown in each graph. If each student

continued at the same speed, which graph shows the hiker that finished the 3-kilometer hike

first?

A.

B.

C.



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D.

19. The graph shows the motion of a student walking at different speeds.

During which time interval does the student walk with a negative acceleration?

A. 0–2 sec ond s

B. 2–4 seconds

C. 4–8 seconds

D. 8–12 seconds



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20. The graph shows the motion of four cars. All four cars are moving east.

Which car has a constant velocity?

A. 1

B. 2

C. 3

D. 4

21. Two swimmers competed in a race. The graph shows how the position of both swimmerschanged over time during the race.

At what rate of speed did Swimmer 1 travel throughout the race?

A.

B.

C.

D.



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22. Students measure how far a snail can travel per minute. The graph shows their data.

What is the speed of the snail?

A. 0.25 min/ cm

B. 0.50 min/cm

C. 1.00 cm/min

D. 4.00 cm/min

23. A student is organizing a room. She moves a box from the floor to a shelf. She wants to

estimate the amount of potential energy the box has on the shelf. What information does the

student need?

A. the volume and mass of the box

B. the mass of the shelf and the mass of the box

C. the mass of the box and the height of the shelf

D. the volume of the box and the height of the shelf



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24. A juggler tosses balls into the air as he juggles.

Which form of energy is increasing as the balls travel up into the air?

A. kinetic energy

B. thermal energy

C. potential energy

D. chemical energy

25. An engineer must calculate the potential energy of a roller coaster car at the top of an

incline. Which information would best help the engineer determine the potential energy of the

car?

A. the distance the roller coaster car must travel

B. the mass of the roller coaster car at full capacity

C. the average weight of an empty roller coaster car

D. the direction that the roller coaster car is traveling

26. A 2.00 kg stone block gains 44.0 J of gravitational potential energy when it is moved up a ramp.

What is the height of the ramp? Use g = 10.0 m/s .

A. 2.00 m

B. 2.20 m

C. 4.40 m

D. 11. 0 m

27. The diagram shows a swinging pendulum. Five different positions of the pendulum are labeled.

Each position contains different amounts of potential and kinetic energy.

2



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The potential and kinetic energy of the pendulum can be represented on bar graphs. Which

graph correctly shows the amount of energy available at position 3?

A.

B.

C.



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D.

28. Some new cars use special braking systems to recover energy when the brakes are applied.

This energy is stored in special batteries and is used to power the electric motor. What type of

energy are the brakes storing as they slow down the car?

A. gravitational

B. kinetic

C. potential

D. thermal

29. While on a movie set, a stuntman jumps off the roof of a building. As he falls toward an airbag,

what is increasing?

A. gravity

B. wind velocity

C. kinetic energy

D. potential energy

30. What does the mechanical energy of a system include?

A. the sum of the potential and kinetic energy

B. the difference of the potential and kinetic energy

C. only the kinetic energy

D. only the potential energy



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31. The diagram below shows a normal fault.

The fault is formed by the release of

A. electromagnetic energy.

B. potential energy.

C. chemical energy.

D. heat energy.

32. A certain type of hybrid car utilizes a braking system in which energy is recovered and stored inbatteries. This is an example of which type of energy conversion?

A. kinetic energy converted to potential energy

B. chemical energy converted to kinetic energy

C. chemical energy converted to thermal energy

D. thermal energy converted to potential energy

33. While on the launch pad, the space shuttle rocket boosters and external fuel tank hold about

pounds of fuel. This amount of fuel is necessary to propel the space shuttle into an

orbit 300 km above Earth. In order to escape the gravity at the surface of Earth, the chemical

energy is converted to which type of energy?

A. kinetic

B. nuclear

C. electrical

D. geothermal

34. Biodiesel is an alternative to gasoline that is produced from fats or oils such as soybean oil or

restaurant grease. Although it is better for the environment than gasoline, it has lower fuel

efficiency. What most likely causes the biodiesel to be less efficient than gasoline?

A. Biodiesel has lower potential energy theref ore release s less kinetic energy.

B. Biodiesel has higher potential energy therefore releases less kinetic energy.

C. Gasoline has lower potential energy therefore releases less kinetic energy.

D. Gasoline has higher potential energy therefore releases less kinetic energy.

35. Which best represents the use of mechanical energy?

A. a light bulb giving off heat

B. a candle providing light

C. a nail being hammered

D. a can rusting



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36. Jorge calculated the gravitational potential energy of the objects shown in the illustration.

Which statement is supported by the calculated data on the table?

A. The gravitat ional potenti al energy of an object is not dependent on its mass.

B. The gravitational energy of an object is inversely proportional to its height above the ground.

C. As the weight of an object is increased, its gravitational potential energy decreases.

D. As the height of an object is increased, its gravitational potential energy also increases.

37. Which of the following best describes the function of a resistor in an electrical circuit?

A. It opens the circuit.

B. It creates the electric field.

C. It controls the amount of current.

D. It provides energy to the circuit.

38. A switch that can open or close an electric circuit can be used to

A. increase the amount of current.

B. reverse the current’s direction.

C. stop the current.

D. accelerate the current.

39. An incandescent bulb placed in a closed circuit works by allowing electrons to travel through a

very thin piece of wire in the bulb. The bulb will then give off infrared radiation. This is an

example of

A. kinetic energy being transformed into potential energy.

B. electrical energy being transformed in heat and light energy.

C. magnetic energy being transformed into electrical energy.

D. electrical energy being transformed into mechanical energy.



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40. A student taps the first marble and the sixth marble rolls away.

What does this activity demonstrate?

A. conservation of energy

B. energy transfer

C. convection

D. radiation

41. A house uses a roof to carry away large amounts of rain efficiently. A roof composed of two

attached inclined planes forms what type of simple machine?

A. wedge

B. s cr ew

C. ra mp

D. lever



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42. Students used rulers as levers during an investigation on simple machines and forces. They

made the arms of the levers different lengths by how they placed the ruler on the desk. They put

a box on the end of the ruler. Which ruler would require the greatest force to be able to lift the

box off the desk?

A.

B.

C.

D.



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43. Use the following diagram to answer the question that follows.

Cars X and Y start at rest and move to the left as shown in the diagram. During that time, Car Y

has

A. less inertia than Car X.

B. more power than Car X.

C. a greater weight than Car X.

D. a lower acceleration than Car X.

44. A student is pushing a 20-kilogram box up a ramp. Which change will require the student to use

less force to push the box?

A. increasing the mass of the boxB. decreasing the length of the ramp

C. decreasing the steepness of the ramp

D. increasing the friction on the surface of the box

45. An electric can opener uses a magnet to hold a can in place. As the wheel on the can opener

turns, a blade cuts the top of the can open.

The blade on the can opener is an example of what kind of simple machine?

A. lever

B. pulleyC. s cr ew

D. w ed ge



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46. A log splitting machine was invented to split logs quickly. A motor powers a metal piece that is

pushed through the middle of a log.

The metal piece used to split a log is an example of what simple machine?

A. a wedge

B. a pulley

C. a screw

D. a lever

47. The wheelbarrow below is classified as a second-class lever.

If a 500 N bag of soil is added to the wheelbarrow, which statement best describes the effort

force?

A. The effort equals load.

B. The effort is less than load.

C. The effort is greater than the load.

D. The effort decreases mechanical advantage.



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48. Jillian and her classmates went to clean up a park. They used a wheelbarrow to move branches

to the side of the road for pick up. The wheelbarrow reduced the effort they need to make to

move the branches.

Which simple machine is in the wheelbarrow that makes the work easier for Jillian and her

classmates?

A. lever

B. pulley

C. s cr ew

D. w ed ge

49. A group of workers needs to move a piano from the second floor of a building. The piano is toowide to fit through the door, so they will lower the piano to the ground through a window.

Which tool would be best to help the workers lower the piano from the window?

A. wheel and axle

B. inclined plane

C. pulley

D. w ed ge

50. Which of the following would have the greatest mechanical advantage?

A.

B.

C.

D.



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51. A worker needs to load a heavy box onto a truck. The worker uses a ramp to move the box

because the ramp

A. increases the weight of the box.

B. reduces the gravitational force on the box.

C. increases the amount of friction on the box.

D. reduces the amount of force applied to the box.

52. Which simple machine increases the distance over which a load travels and reduces the

needed force? A. wheel and axle

B. w ed ge

C. pulley

D. inclined plane

53. Stephen needs to lift a large box off of the floor. He makes two different pulley systems to help him lift

the box. Then he tries using each of the pulley systems.

To find out which pulley system needs less power to work, what measurement must Stephen record

each time the box is lifted?

A. length of the rope

B. strength of the student

C. height the box is raised

D. force used to raise the box



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54. Workers push a heavy box up an inclined plane and onto a truck.

Which best explains why these workers use an inclined plane?

A. It makes their work easier.

B. It keeps their clothing clean.

C. It keeps the box from breaking.

D. It makes the box weigh less.


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