RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

SCIENCES 20F – KINEMATICS UNIT REVIEWNAME:_______________________PART A: Fill in the blank with the most appropriate vocabulary word (20 points)1. DISTANCE The total length of a path, from beginning to end.2. VELOCITY The speed of an object, with the direction specified, is called…3. DISPLACEMENT The difference in position between where the trip began and where it ended.4. DEPENDENT The variable during an experiment that we do NOT control.5. INDEPENDENT The variable during an experiment that we DO control.6. POSITION-TIME / DISTANCE-TIME A graph that represents the motion of an object by plotting distance over time.7. NEGATIVE ACCELERATION The appropriate scientific term for "deceleration".8. SPEED / VELOCITY The slope of a distance-time graph shows us this.9. ACCELERATION The slope of a velocity-time graph shows us this.10. -9.8 m/s2 or 9.8 N The numeric value of gravitational pull on Earth.11. FRICTION Any force that resists motion.12. FREE FALL The state of an object that falls with only force of gravity acting on it.13. NEWTON’S THIRD LAW OF MOTION For every action there is an equal and opposite reaction.14. FORCE X = (mass)(acceleration); What does "X" represent in this equation?15. INPUT X energy = output energy; What does "X" represent in this equation?16. DISPLACEMENT The “as the crow flies” distance between where you start and where you begin.17. NEWTON’S FIRST LAW OF MOTION / NEWTON’S LAW OF INERTIA The tendency of an object to remain at rest or to remain in motion.18. V = D/T A formula we could use to calculate the time it takes an object to fall.19. V = D/T A formula we could use to calculate the average velocity of an object.20. VELOCITY-TIME The type of graph that requires us to calculate area in order to determine displacement.** There are several other formulae that could serve as answers to questions 18 and 19. **

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RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

PART B: Use your formula sheet and answer the following questions showing all work (15 x 5 = 75 points)1. Pete is driving down 7th street. He drives 150 meters in 18 seconds. Assuming he does not speed up or slow down, what is his speed in meters per second? 8.33 m/s2. A person jogs 4.0 km in 32 minutes, then 2.0 km in 22 minutes, and finally 1.0 km in 16 minutes. What is the jogger’s average speed in km per minute? 0.1 km/h3. A train travels 120 km in 2 hours and 30 minutes. What is its average speed? 48 km/h4. A plane’s average speed between two cities is 600 km/hr. If the trip takes 2.5 hrs. how far does the plane fly? 1500 km5. George walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his velocity per second? 38.46 m/s, North(ward)6. A roller coaster’s velocity at the top of a hill is 10 m/s. Two seconds later it reaches the bottom of the hill with a velocity of 26 m/s. What was the acceleration of the coaster?

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RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

8 m/s/s7. A roller coaster is moving at 25 m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the coaster? -5 m/s/s8. A car traveling at 15 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is its acceleration? -1.5 m/s/s9. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the velocity of the ball the instant before it hits the ground? -29.4 m/s10. A boy throws a ball straight up into the air. It reaches the highest point of its flight after 4 seconds. How fast was the ball going when it left the boy’s hand? 39.2 m/s11. A train moves from rest to a speed of 25 m/s in 30.0 seconds. What is its acceleration? 0.83 m/s/s12. If a train going 60 m/s hits the brakes, and it takes the train 1 minute 25 seconds to stop, what is the train’s acceleration? -0.71 m/s/s13. How long will it take a car to go from a complete stop to 44 km/hr if they are accelerating at 5 km/hr2? 8.8 hours OR 8 hours 48 minutes

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RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

14. You are in Hawaii, enjoying a morning of horseback riding. After lunch, you will be scuba diving. You need to figure out how much longer you will be horseback riding to see if you can make it before your scuba diving boat departs. You have to go 3 miles west to get back to your car, and your horse is traveling 5 miles per hour; how much longer until you reach your car?0.6 of an hour OR 3/5 of an hour OR 36 minutes15. How long will it take a car to accelerate from 15.2 m/s to 23.5 m/s if the car has an average acceleration of 3.2 m/s2? 2.59 seconds16. Answer the following questions using the p-t graph below:

a) What is the total displacement?9 metersb) What is the velocity in the first 2 seconds? How do you know this?13/2 m/s OR 6.5 m/sc) What is the velocity in the next 2 seconds?-2.25 m/s4

RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

d) What is the velocity in the final 2 seconds? 1.25 m/se) What is the average velocity over the entire 10-second trip? Show your work.9/10 m/s OR 0.9 m/s

PART C: Use the following information and create a Distance-Time graph AND the corresponding Velocity-Time graph (2 x 10 = 20 points)** PUT BOTH GRAPHS ON THIS ONE SHEET OF GRID PAPER **

TIME (s) DISTANCE (m)0 02 204 206 608 11010 200

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RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

PART D: Identify each situation as representing Newton's First, Second or Third Law... WRITE THE NUMBERS IN LETTERS OR DIGITS. The first one is done as an example. Ensure your answer is legible!(25 points)3 A fireman turns on his hose & is knocked backwards2 It takes less force to move a DVD than a DVD player2 You have to push a heavy ball harder to get it to move as fast as a small one

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RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

1 A soccer ball will not move until a player kicks it3 If air is let out of a balloon quickly, air pushes down & balloon goes up2 It takes less force to push a bike than a motorcycle3 A bowling ball hits the pins sending the pins flying for a STRIKE!3 Feet push down on the floor & the floor pushes up at feet as you walk2 A 12 lb bowling ball goes faster down the lane than a 15 lb bowling ball3 In a plane taking off you feel pushed back into your seat2 Push a large box & a small box with the same force, the small box will go faster1 A seatbelt stops you from hitting the windshield if you hit the brakes quickly2 A boy can throw a football farther than his friend because he uses more force3 When you push on a door it pushes back with equal and opposite force1 Someone crashes their bike into a rock & is thrown over it to the ground1 A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.1 A person's body is thrown outward as a car rounds a curve on a highway.3 Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.

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RANKINE – SCI – SCI20F – Kinematics 2017 / 2018

1 A picture is hanging on a wall and does not move.2 Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more inertia.2 A soccer ball accelerates more than a bowling ball when thrown with the same force.1 A student leaves a pencil on a desk and the pencil stays in the same spot until another student picks it up.1 A hockey puck sliding on the ice will eventually stop.2 The same group of people pushing a small car manage to push it much farther than a mini-van.3 You jump on a diving board and it pushes you up into the air.

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