Objects A and B, of mass M and 2M respectively, are each pushed a distance d straight up an inclined plane by a force F parallel to the plane. The coefficient of kinetic friction between each mass and the plane has the same value mk. At the highest point,
a. KA > KB.
b. KA = KB.
c. KA < KB.
d. The work done by F on A is greater than the work done by F on B.
e. The work done by F on A is less than the work done by F on B.
Question 2
An astronaut tosses a ball out in space where gravitational forces may be neglected. What will happen to the ball?
a. It will stop as soon as the force the astronaut gave it is used up.
b. It will stop when the energy the astronaut gave it runs out.
c. It will stop after a short time because there is no gravity to keep it moving.
d. It will move in a circle like a boomerang.
e. It will be slowed down very gradually by collisions with molecules in space.
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