A block of mass 10 Kg accelerates from rest to a velocity of 20 m/s in 5s under the influence of an external force. What is the work done by the external force?
A. 2000 J
B. -2000 J
C. 20000 J
D. -20000 J
Answer:A
A block of mass 10 Kg accelerates from rest to a velocity of 20 m/s in 5s under the influence of an external force. What is the work done by the external force?
A. 2000 J B. -2000 J C. 20000 J D. -20000 J