A body of mass 2 Kg, initially at rest, moves under the influence of an external force of magnitude 4 N on plane ground. What is the work done by the force and the change in kinetic energy in the first 10 seconds?
A. 400 J, 400 J
B. -400 J, 400 J
C. 400 J, -400 J
D. -400 J, -400 J
Answer:A
A body of mass 2 Kg, initially at rest, moves under the influence of an external force of magnitude 4 N on plane ground. What is the work done by the force and the change in kinetic energy in the first 10 seconds?
A. 400 J, 400 J B. -400 J, 400 J C. 400 J, -400 J D. -400 J, -400 J