beginning of content:
SAT Subject Test
An object with mass and speed
directed to the right strikes a wall and rebounds with speed
directed to the left.
The change in the object's kinetic energy is
Select an Answer
Correct Answer:
No
Correct Answer:
No
Correct Answer:
Yes
Correct Answer:
No
Correct Answer:
No
View Correct Answer
The correct answer is zero. The kinetic energy of an object of mass moving at speed
is
. Since the object has the same speed before and after striking the wall, its kinetic energy does not change.
Question Difficulty:
medium