Answer:
20 W.
Explanation:
Power is defined as the time rate oc change at which work is done.
Mathematically,
Power, P = workdone/time
Given:
vi = 0 m/s
F = 10 N
m = 5 kg
t = 2 s
F = ma
a = 10/5
= 2 m/s^2
Using equation of motion,
vf = vi + at
vf = 2 * 2
= 4 m/s
Workdone = potential energy, PE+ kinetic energy, KE
PE = 0
KE = 1/2 * m * v^2
= 1/2 * 5 * (4^2)
= 40 J
Power, P = 40/2
= 20 W.
