Question

2.
A particle is released from rest at origin. It moves under
influence of potential field U=x2-3x. Kinetic energy
at x = 2 is
a. 2J
b. 1J
c. 1.5 J
d. OJ​

Answer 1

U=0 at rest

at x=2

4-3*2

-2

this change is U converted to KE

KE=2J

Answer 2

Explanation:

U=0

2×2-3×2=0

4-6=-2

kinetic energy=-2

Since energy is a scalar

then the answer is 2J