Linear Motion ReviewLinear Motion Review

A girl leaves a history classroom and walks 10 meters north to a drinking fountain. Then she turns and walks 30 meters south to an art classroom. What is the girl’s total displacement from the history classroom to the art classroom?

(A) 20 m south (C) 40 m south(B) 20 m north (D) 40 m north

A child walks 5.0 meters north, then 4.0 meters east, and finally 2.0 meters south. What is the total distance the child travels?

(A) 1.0 m (B) 5.0 m (C) 3.0 m(D) 11.0 m

A child walks 5.0 meters north, then 4.0 meters east, and finally 2.0 meters south. What is the magnitude of the resultant displacement of the child after the entire walk?

(A) 1.0 m (B) 5.0 m (C) 3.0 m(D) 11.0 m

On a highway, a car is driven 80 kilometers during the first 1.00 hour of travel, 50 kilometers during the next 0.50 hour, and 40 kilometers in the final 0.50 hour. What is the car’s average speed for the entire trip?

(A) 45 km/h(B) 60. km/h(C) 85 km/h (D) 170 km/h

The speed of an object undergoing constant acceleration increases from 8.0 m/s to 16.0 m/s in 10 seconds. What is the acceleration?

(A) 8.0 × 10-2 m/s2

(B) 8.0 × 10-1 m/s2

(C) 8.0 × 100 m/s2

(D) 8.0 × 101 m/s2

Acceleration due to gravity is approximately what value?

A.) 12 m/s2

B.) 9.8 m/s2

C.) 7 m/s2

D.) 0 m/s2

A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. At its maximum height, the speed of the ball is

(A) 0.0 m/s (C) 9.8 m/s

(B) 3.1 m/s (D) 24 m/s

A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. At its maximum height, the acceleration of the ball is

(A) 0.0 m/s2 (C) 9.8 m/s2

(B) 3.1 m/s2 (D) 24 m/s2

A student throws a baseball vertically upward and then catches it. If vertically upward is considered to be the positive direction, which graph best represents the relationship between velocity and time for the baseball?

A basketball player jumped straight up to grab A basketball player jumped straight up to grab a rebound. If she was in the air for 0.80 a rebound. If she was in the air for 0.80 second, how high did she jump?second, how high did she jump?

(A) 0.50 m (A) 0.50 m (B) 1.2 m(B) 1.2 m(C) 0.78 m (C) 0.78 m (D) 3.1 m(D) 3.1 m

The speed of a car is increased uniformly from 20 meters per second to 30 meters per second in 4.0 seconds. The magnitude of the car’s average acceleration in this 4.0-second interval is(A) 0.40 m/s2 (B) 10 m/s2

(C) 2.5 m/s2 (D) 13 m/s2

Which term represents a scalar quantity?

(A) distance(B) force (C) displacement(D) weight

Which vector diagram represents the greatest magnitude of displacement for an object?

One car travels 40 meters due east in 5.0 seconds, and a second car travels 64 meters due west in 8.0 seconds. During their periods of travel, the cars definitely had the same

(A) average velocity(B) total displacement(C) change in momentum(D) average speed

A ball dropped from rest falls freely until it hits the ground with a speed of 20 m/s. The time during which the ball is in free fall is approximately

(A) 1 s(B) 0.5 s (C) 2 s(D) 10 s

A 25-Newton weight falls freely from rest from the roof of a building. What is the total distance the weight falls in the first 1.0 second?

(A) 19.6 m (B) 9.8 m(C) 4.9 m (D) 2.5 m

A student throws a baseball vertically upward and then catches it. If vertically upward is considered to be the positive direction, which graph best represents the relationship between velocity and time for the baseball?

The speedometer in a car does not measure the car’s velocity because velocity is a

(A) vector quantity and has a direction associated with it

(B) vector quantity and does not have a direction associated with it

(C) scalar quantity and has a direction associated with it

(D) scalar quantity and does not have

Nonlinear Motion

and

Circular Motion

A golf ball is given an initial speed of 20 m/s and returns to level ground. Which launch angle above level ground results in the ball traveling the greatest horizontal distance?

(A) 60°(B) 45°(C) 30° (D) 15°

A projectile launched at an angle of 45° above the horizontal travels through the air. Compared to the projectile’s theoretical path with no air friction, the actual trajectory of the projectile with air friction is

(A) lower and shorter(B) lower and longer (C) higher and shorter(D) higher and longer

A golf ball is hit with an initial velocity of 15 m/s at an angle of 35 degrees above the horizontal. What is the vertical component of the golf ball’s initial velocity?

A golf ball is hit with an initial velocity of 15 meters per second at an angle of 35 degrees above the horizontal. What is the horizontal component of the golf ball’s initial velocity?

An airplane flies with a velocity of 750 km/hour, 30.0° south of east. What isthe magnitude of the eastward component of the plane’s velocity?

(A) 866 km/h (B) 433 km/h(C) 650 km/h (D) 375 km/h

A ball dropped from rest falls freely until it hits the ground with a speed of 40 m/s. The time during which the ball is in free fall is approximately

(A) 1 s(B) 2 s (C) 4 s(D) 8 s

A ball is thrown horizontally at a speed of 24 meters per second from the top of a cliff. If the cliff is 125 m high, how much time elapses until the ball hits the ground?

(A) 2.0 s (B) 5.0 s(C) 6.2 s (D) 12.5 s

A ball is thrown horizontally at a speed of 24 meters per second from the top of a cliff. If the cliff is 125 m high, how much far from the edge of the cliff does the ball hit?

(A) 24 m (B) 72 m(C) 120 m (D) 585 m

Newton’s Third Law

For every action there is an equal and opposite reaction.

Consider hitting a baseball with a bat. If we call the force applied to the ball by the bat the action force,

identify the reaction force.

(a) the force applied to the bat by the hands(b) the force applied to the bat by the ball(c) the force the ball carries with it in flight(d) the centrifugal force in the swing

A carpenter hits a nail with a hammer. Compared to the magnitude of the force the hammer exerts on the nail, the magnitude of the force the nail exerts on the hammer during contact is

(A) less(B) greater(C) the same

Inertia

A 10-kilogram block is at rest on a plane inclined at 15° to the horizontal. As the angle of the incline is increased to 30°, the mass of the block will

(A) decrease (B) increase (C) remain the same

A 0.50-kilogram cart is rolling at a speed of 0.40 meter per second. If the speed of the cart is doubled, the inertia of the cart is

(A) halved (B) doubled(C) quadrupled (D) unchanged

Net Force

The vector diagram represents two forces, F1 and F2, simultaneously acting on an object. Which vector best represents the resultant of the two forces?

The diagram above shows a5.00-kilogram block at reston a horizontal, frictionless table Which diagram best represents the force exerted on the block by the table?

A box is pushed toward the right across a classroom floor. The force of friction on the box is directed toward the

(A) left (B) right (C) ceiling (D) floor

A sled and rider slide down a snow-covered hill that makes an angle of 30° with the horizontal. Which vector best represents the direction of the normal force, F

N, exerted by the hill on the sled?

A person is standing on a bathroom scale in an elevator car. If the scale reads a value greater than the weight of the person at rest, the elevator car could be moving

(A) downward at constant speed(B) upward at constant speed(C) downward at increasing speed(D) upward at increasing speed

F=ma

The magnitude of the acceleration of block B is

(A) 6.0 m/s2 (B) 2.0 m/s2 (C) 3.0 m/s2

(D) 4.0 m/s2

Dr. E has a mass of 88 kg. What is his weight Dr. E has a mass of 88 kg. What is his weight (Newtons)?(Newtons)?

When he jumped out of the airplane what was When he jumped out of the airplane what was his initial acceleration (m/shis initial acceleration (m/s22)?)?

After several seconds, the force of air resistance After several seconds, the force of air resistance was 400-N up. What was his downward force was 400-N up. What was his downward force

(Newtons)?(Newtons)?

What is his current acceleration (m/sWhat is his current acceleration (m/s22)?)?

What is the weight of a 2.00-kilogram object on the surface of Earth?

(A) 4.91 N (B) 2.00 N(C) 9.81 N (D) 19.6 N

A 25-N horizontal force northward and a 35-N horizontal force southward act concurrently on a 15-kg object on a frictionless surface. What is the magnitude of the object’s acceleration?

(A) 0.67 m/s2 (B) 1.7 m/s2 (C) 2.3 m/s2 (D) 4.0 m/s2

A 60-kg physics student would weigh 1560 N on the surface of planet X. What is the magnitude of the acceleration due to gravity on the surface of planet X?

(A) 0.038 m/s2

(B) 6.1 m/s2

(C) 9.8 m/s2 (D) 26 m/s2

Which body is in equilibrium?

(A) a satellite orbiting Earth in a circular orbit(B) a ball falling freely toward the surface of

Earth (C) a car moving with a constant speed along a

straight, level road(D) a projectile at the highest point in its

trajectory

The diagram above represents a 5.0-N force and a 12-N force acting on point P. The resultant of the two forces has a magnitude of(A) 5.0-N (B) 7.0-N (C) 12-N (D) 13-N

A student standing on the roof of a 50.0-meter-high building kicks a stone at a horizontal speed of 4.00 meters per second. How much time is required for the stone to reach the level ground below?

(A) 3.19 s(B) 5.10 s (C) 10.2 s(D) 12.5 s

If a 65-kg astronaut exerts a force with a magnitude of 50 N on a satellite that she is repairing, the magnitude of the force that the satellite exerts on her is

(A) 0 N(B) 50 N less than her weight(C) 50 N more than her weight(D) 50 N

A high school physics student is sitting in a seat reading this question. The magnitude of the force with which the seat is pushing up on the student to support him is closest to

(A) 0N (B) 60 N(C) 600N(D) 6,000 N

Object Mass (kg) Speed (m/s)

A 4 6

B 6 5

C 8 4

D 10 1.5

Which object has the greatest inertia?

(A) A(B) B (C) C(D) D

On a highway, a car is driven 80 kilometers during the first 1.00 hour of travel, 50 kilometers during the next 0.50 hour, and 40 kilometers in the final 0.50 hour. What is the car’s average speed for the entire trip?

(A) 45 km/h(B) 60. km/h(C) 85 km/h (D) 170 km/h

A high-speed train in Japan travels a distance of 300 kilometers in 3.60 × 103 seconds. What is the average speed of this train?

(A) 1.20 × 10–2 m/s(B) 12.0 m/s (C) 8.33 × 10–2 m/s(D) 83.3 m/s

A baseball player runs 27.4 meters from the batter’s box to first base, overruns first base by 3.0 meters, and then returns to first base. Compared to the total distance traveled by the player, the magnitude of the player’s total displacement from the batter’s box is

(A) 3.0 m shorter (B) 3.0 m longer(C) 6.0 m shorter (D) 6.0 m longer

Which is a vector quantity?

(A) speed(B) work (C) mass(D) displacement

Velocity is to speed as displacement is Velocity is to speed as displacement is to to

(A) acceleration (A) acceleration (B) momentum(B) momentum(C) time (C) time (D) distance(D) distance