Assume potential energy is zero at the bottom of the ramp. 1. How does increasin

Question

Assume potential energy is zero at the bottom of the ramp.


1. How does increasing the mass of an object affect the total mechanical energy of the object when it is at rest at the top of the ramp?
a)Increasing the mass increases total mechanical energy because kinetic energy is increased.
b)Increasing the mass increases total mechanical energy because potential energy is increased.
c)Increasing the mass decreases total mechanical energy because kinetic energy is decreased.
d)Increasing the mass decreases total mechanical energy because potential energy is decreased.
e)cannot determine

2. How does increasing the moment of inertia of an object about an axis through its center of mass affect the object's potential energy at the top of the ramp?
a)Increasing the moment of inertia increases the potential energy.
b)Increasing the moment of inertia decreases the potential energy.
c)The change in potential energy depends on how the moment of inertia is increased.

3. How does increasing the moment of inertia of an object about an axis through its center of mass affect the object's potential energy at the top of the ramp?
a)Increasing the moment of inertia increases the potential energy.
b)Increasing the moment of inertia decreases the potential energy.
c)The change in potential energy depends on how the moment of inertia is increased.

4. Two objects are placed at the top of a ramp, one object has mass M and the other has mass 2M. The objects slide to the bottom of the ramp. Ignoring the effects of friction, which object reaches the bottom first?
a)the object of mass M
b)the object of mass 2M
c)The objects reach the bottom at the same time.
d)cannot determine

5. Returning to our initial problem, which object do you think will "win the race"?
a)It will be the heaviest object (Object 5).
b)It will be the lightest object (Object 7).
c)It will be a tie between the objects with the smallest radius (Objects 7, 8, 9 & 10).
d)It will be a tie between the objects with the largest radius (Objects 1, 3 & 5).
e)It will be a tie between the hoops (Objects 1 & 2).
f)It will be a tie between the disks (Objects 3 & 4).
g)It will be a tie between the solid spheres (Objects 5, 6, 7, 8 & 9).
h)It will be the hollow sphere (Object 10).
i)other

Explanation / Answer

a)Increasing the mass increases total mechanical energy because kinetic energy is increased.

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