Download CHS Ch 3 study guide

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1.
List Newton’s 3 Laws of Motion. You must know which one is which for the test.
2. A dog pulls a 10kg box with 20 N of force to the left while two cats pull with a total force of 15 N
to the right.
a. Draw the free body diagram (FBD)
b. What is the net force on the box?
c. Calculate the acceleration of the box.
3. Draw FBD’s for the following:
a. An iphone motionless on a desk
b. A skydiver first exits plane, not yet encountering air resistance
c. A skydiver encountering air resistance but still accelerating
d. A skydiver at constant velocity
e. A skydiver hanging in the air because his parachute hangs in a tree
f.
A sled being pulled by a dog with a force of 5N across grass with a frictional force of 2N.
Calculate the net force.
4. A force of 15 N causes a book to accelerate 5 m/s2, what is its mass?
5. How much force will it take for a 5 kg toy train to accelerate at 4 m/s2?
6. What is the acceleration due to gravity on earth? (Round to the one’s place)
7. A car weighs 12,000N on Earth, what is its mass?
8. How much does the same car weigh on Jupiter if the acceleration due to gravity is 25.4 m/s2.
9. Calculate the momentum of a 13kg cart moving at a speed of 3m/s.
10. What is the mass of a dog moving at a speed of 7m/s and a momentum of 18kgm/s?
11. What is the upward force on an object falling through the air?
12. If a bowling ball and a feather are thrown off a building at the same height, which will hit the
ground first? Explain why.
13. If a bowling ball and a feather dropped on the moon where there is no atmosphere, which will
hit the ground first? Explain why.
14. The amount of gravitational force between two objects depends on what two factor?
15. What has more momentum at 20 km/h, a bicycle or a bus? Why?
16. What has more momentum, a car at 20 km/h or the same car at 40 km/h? Why?
17. What happens to the momentum of both objects when a moving pool ball collides into a
stationary pool ball?
18. What is the equation for momentum? What are the units for each variable?
19. What is the equation for force? What are the units for each variable?
20. What is inertia?
21. What is free fall?
22. What is terminal velocity?
23. What is momentum? How does it differ from inertia?
24. What causes weightlessness on the orbiting space station?
25. What is the difference between weight and mass?
26. What is the maximum acceleration of a bottle rocket with a mass of 1.2kg and an upward force
of 20N?
27. A car is traveling clockwise at a constant speed around the track below. Draw arrows showing
the direction of the acceleration at each star.