Download Semester 1 – Review Problems

CP Physics
Semester 1 – Review Problems
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Problems 1–8: You toss a 0.5 kg ball up in the air and catch it 8 seconds later.
Your hand is 1.5 m above the ground when you release the ball.
1. Draw a velocity vs. time graph for the entire time the ball is in the air.
2. Find the maximum height above the ground the ball reaches.
3. What is the velocity of the ball at this max height?
4. What is the acceleration of the ball at this max height?
5. How long does it take the ball to get to this max height?
6. What is the velocity of the ball when you catch it?
7. Draw a force diagram for the ball while it is in the air.
8. How would your answers to questions 2–5 change if the ball’s mass doubled?
Problems 9–16: A 2,500 kg tow truck pulls a
broken down, 1,500 kg car down the road. The
force of friction is 3,000 N.
9. Draw a force diagram for the car.
10. What is the normal force the ground exerts on the
car?
11. What is the acceleration of the car if the tow truck
pulls with 10,000 N of force?
12. Assuming the tow truck can maintain this force,
how long would it take to move the car 132 m?
13. What would be the tow truck’s speed at this time?
Now that the tow truck is moving at roughly the speed limit, the driver sets the cruise control and moves
at a constant velocity for an additional 12 seconds.
14. What force does the tow truck pull with on the car now?
15. Draw a velocity vs. time graph for the entire story.
16. How far does the car move from the beginning to the end of the story?
Problems 17–20: A sheriff has been tied to the train tracks by a band of outlaws. A 20,000 kg train is
approaching, traveling at 26 m/s. The conductor of the train sees the sheriff when the train is 500 m
away and immediately begins breaking.
17. Draw a velocity vs. time graph for the train starting when the brakes are applied.
18. What minimum acceleration would the train need in order to not hit the sheriff?
19. With this acceleration, how long would it take the train to stop?
20. What breaking force would be needed to accomplish this?
Problems 21–22: A hand pushes two blocks to the right as shown. Block
A is more massive than B: mA>mB. The blocks are accelerating.
21. Draw separate force diagrams for A, B, and the hand.
22. By applying Newton’s Laws to each block, rank in order all of the
horizontal forces, from largest to smallest.
Problems 23–30: Create a physical situation which matches the !
requirements given. Draw a picture, force diagram, and show !F graphically.
23. An object has 3 forces acting on it and is moving at a constant velocity.
24. An object has 2 forces acting on it and is accelerating.
25. An object has 3 forces acting on it and is accelerating.
26. An object has 4 forces acting on it and is not moving.
27. An object has 4 forces acting on it and is accelerating.
28. An object has 5 forces acting on it and is not moving.
29. Two connected objects which have a combined number of 6 forces and are moving at constant speed.
30. Two connected objects which have a combined number of 7 forces and are accelerating.
31. You are on a spacewalk when your portable jetpack malfunctions. You have very little air left. How do
you get back to the space station? Explain with clear reasoning and a picture.