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