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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

A Constant Horizontal Pull Acts on a Sled on a Horizontal