Question

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​

Answer 1

Step-by-step 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,

`W=Fd\\\\W=310* 30\\\\W=9300\ J`

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

`P=(W)/(t)\\\\P=(9300)/(3)\\\\P=3100\ W`

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