A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts
-
A.
250.0s -
B.
25.0s -
C.
2.5s -
D.
0.5s
Correct Answer: Option B
Explanation
Force x Distance = Power x Time
Time = (frac{Force times Distance}{Power})
= (frac{20 times 500}{0.4 times 1000})
= 25.0s