Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The quantity Fd/t is
a. the kinetic energy of the crate
b. the potential energy of the crate
c. the linear momentum of the crate
d. the work you do on the crate
e. the power you supply to the crate
E
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Which Saturnian moon has the leading hemisphere black as tar, the back side icy white?
A) Rhea B) Titan C) Enceladus D) Iapetus E) Mimas
A girl is sitting on the edge of a pier with her legs dangling over the water. Her soles are 80.0 cm above the surface of the water. A boy in the water looks up at her feet and wants to touch them with a reed. (nwater = 1.333.) He will see her soles as being
a. right at the water surface. b. 53.3 cm above the water surface. c. exactly 80.0 cm above the water surface. d. 107 cm above the water surface. e. an infinite distance above the water surface.
Initially, a blue automobile has twice the kinetic energy that a red automobile has. Both are braked to a stop; both have the same amount of braking force. The red auto will stop in ________ as the blue auto.
A. half the distance B. four times the distance C. the same distance D. twice the distance E. one fourth the distance
A crate is at rest on a horizontal floor, with nobody pushing. The friction force acting on the crate is
A) zero. B) equal to the weight of the crate. C) between zero and the weight of the crate. D) none of the above