A constant horizontal pull acts on a sled on a horizontal frictionless ice pond. The sled starts from rest. When the pull acts over a distance x, the sled acquires a speed v and a kinetic energy K. If the same pull instead acts over twice this distance:
A) The sled's speed will be 2v and its kinetic energy will be 2K.
B) The sled's speed will be 2v and its kinetic energy will be K
.
C) The sled's speed will be v
and its kinetic energy will be 2K.
D) The sled's speed will be v
and its kinetic energy will be K
.
E) The sled's speed will be 4v and its kinetic energy will be 2K.
Correct Answer:
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