Multiple Choice
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:

Verified
Correct Answer:
Verified
Q11: How much energy is needed to change
Q12: Consider a plot of the displacement (x)as
Q13: A force F = bx<sup>3</sup> acts in
Q14: A 4.00-kg mass is attached to a
Q15: A stock person at the local grocery
Q17: A 3.00-kg ball swings rapidly in a
Q18: Calculate the minimum average power output necessary
Q19: A 1500-kg car accelerates from 0 to
Q20: A child pulls on a wagon with
Q21: A traveler pulls on a suitcase strap