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At two positons kinetic energy and poten...

At two positons kinetic energy and potential energy of a particle are `K_(1) =10J: U_(1) =-20J, K_(2) = 20 J, U_(2)=-10 J`. In moving from 1 to 2 .

A

work done by conservative forces is positive.

B

work done by conservative forces is negative.

C

work done by all the forces is positive .

D

work done by all the forces is negative.

Text Solution

Verified by Experts

The correct Answer is:
B, C
Work done by conservative frtces
`=U_(i) -U_(f)=-20+10=-10 J`
Work done by all the forces,
`K_(f)-K_(i)=20-10 =10 J`
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