A force of 310.0 N is used to push a 120 kg mass, 30.0 m horizontally in 3.00 s.
(a) Calculate the work done on the mass.
[ ] × kJ
(b) Calculate the power developed.
[ ] kW

Explanation:

We have,

Force acting on the mass is 310 N

Mass, m = 120 kg

Distance covered by the mass is 30 m

Time, t = 3 s

To find,

(a) Work done (b) power developed

Solution,

(a) The work done on the mass is given by the product of force and displacement such that,

(b) The rate at which the work is done is called power developed. Its formula is given by :

Therefore, the work done on the mass is 9300 J and the power developed is 3100 W.