QUIZ Science 8 laws of motion and work .pptx

Laws of motion and work quiz, with simple computation

1. Quiz

2. I. Write a 1, 2 or 3 for each of the following to indicate whether it’s Newton’s 1st, 2nd or 3rd law. ______ 1. A climber pulls down on a rope causing his body to lift upward and rise along the rope. ______ 2. Force = Mass x Acceleration

3. ______ 3. Two bumper cars collide into each other and each car jolts backwards ______ 4. When you give your friend a lift on your bike you have to pedal harder and faster to keep the same speed (acceleration) as you had when you were on your bike alone

4. ______ 5. For every action there is an equal and opposite reaction. ______ 6. A smaller cannon ball leaves a cannon much faster than a larger, heavier cannon ball fired at the same time.

5. ______ 7. When you are standing in a subway train and the train suddenly stops but your body continues to move forward. ______ 8. It is much easier to carry your backpack when it is empty rather than when it’s full of textbooks.

6. ______ 9. A boy is going down a slide. As he reaches the bottom, friction causes him to slow down and stop. ______ 10. When you paddle a canoe, the canoe moves forward.

7. II. Draw a ✔ if work is done and ✖ if no work is done. _____ 1. a grocery bag as you lift it up _____ 2. a crane moving dirt _____ 3. a crate as you push it along the floor

8. II. Draw a ✔ if work is done and ✖ if no work is done. _____ 4. a person sitting on a bench _____ 5. ice skater’s partner carries her across the ice a distance of 3 m

9. III. Solve for work. 2 m , 25 N 9 N , 1 m 150 N , 24 m 16 m , 202 N 5 N , 0.3 m