Solve this: Q A body of mass 10 kg is moving with velocity 10 m/s The work done - Science - Force and Laws of Motion

Question

Solve this:
Q A body of mass 10 kg is moving with velocity 10 m/s The work done
to stop the body is
(A) + 500 J
(B) - 500 J
(C) + 1000 J
(D) - 1000 J

Deepak Kumar · Accepted Answer

Dear Student ,
m= 10 kg v = 10 m /s KE= 12×10×10×10KE=500j 
The kinetic energy of a body of mass m=10kg moving at v=10m/s is
E=(1/2)mv² After being stopped, the kinetic energy of the body
has been transferred to work done (assuming no frictional loss),
and has nothing left So we can find Work done=loss/reduction in
kinetic energy
Regards

Solve this: Q. A body of mass 10 kg is moving with velocity 10 m/s. The work done to stop the body is (A) + 500 J (B) - 500 J (C) + 1000 J (D) - 1000 J

Solve this:
Q. A body of mass 10 kg is moving with velocity 10 m/s. The work done to stop the body is
(A) + 500 J
(B) - 500 J
(C) + 1000 J
(D) - 1000 J