For questions 26-31: use the following choices:
A. upward B. downward
C. zero
_____ 26. On the way up, the acceleration of the coin is _________ .
_____ 27. On the way up, the velocity of the coin is _________ .
_____ 28. At the highest point, the acceleration of the coin is _________ .
_____ 29. At the highest point, the velocity of the coin is _________ .
_____ 30. On the way down, the acceleration of the coin is _________ .
_____ 31. On the way down, the velocity of the coin is _________ .
For questions 32-34 answer by writing "true" or "false."
_____ 32. As the coin nears the top of the flight, its acceleration decreases until it is zero for a
single point in time.
_____ 33. The coin takes longer to go from the point of release to the maximum height than it
does to go from the maximum height back down to the point of release.
_____ 34. When the coin returns to the point of release, it will be going just as fast as when it
was initially released.
Questions 29-33 refer to collisions between a car and truck. For each description of a collision choose the answer from the choices below that best
describes the forces between the car and truck.
A.
B.
C.
D.
E.
The truck exerts a greater amount of force on the car than the car exerts on the truck.
The car exerts a greater amount of force on the truck than the truck exerts on the car.
Neither exerts a force on the other; the car gets smashed because it is in the way of the truck.
The truck exerts a force on the car but the car doesn’t exert a force on the truck.
The truck exerts the same amount of force on the car as the car exerts on the truck.
In questions 29-31 the truck is much more massive than the car.
_____
29. They are both moving at the same speed when they collide.
_____
30. The car is moving much faster than the more massive truck when they collide.
_____
31. The more massive truck is standing still when the car hits it.
In questions 32-33 the truck is a small pickup that has the same mass as the car.
_____
32. They are both moving at the same speed when they collide.
_____
33. The truck is standing still when the car hits it.
Questions 34-36 refer to a large truck which breaks down out on the road and receives a push back to town by a small compact car. Pick one of the
choices below which correctly describes the forces between the car and the truck for each of the descriptions.
A. The force of the car pushing the truck is equal to that of the truck pushing back on the car.
B. The force of the car pushing the truck is less than that of the truck pushing back on the car.
C. The force of the car pushing the truck is greater than that of the truck pushing back on the car.
D. The car’s engine is running so it applies a force as it pushes back against the truck, but the truck’s engine isn’t running so it
can’t push back with a force against the car.
E. Neither the car nor the truck exert any force on each other. The truck is pushed forward simply because it is in the way of
the car.
_____
34. The car is pushing on the truck, but not hard enough to make the truck move.
_____
35. The car, still pushing the truck, is speeding up to get to cruising speed.
_____
36. The car, still pushing on the truck is at cruising speed and continues to travel at the same speed.
Problems 15-19 refer to a brick on the earth and a brick on the moon where the
force of gravity is only 1/6 of its value on the earth. Indicate at which location
each of the following statements would be true. Choose “A” for the earth, “B”
for the moon, and “C” if there is no difference between the earth and the moon.
_____15.The brick will feel the heaviest.
_____16.The brick, sitting on a frictionless cart, will be the hardest to
accelerate.
_____17.The brick will have the most mass.
_____18.The brick will have the most weight.
_____19.The brick will have the most inertia.