Question

A mass of 100 kg is pulled by a 392 N force in the +X direction along a rough surface (uk=0.4) with uniform velocity v=20 m/s. What is the TOTAL work done by ALL forces on the object after s=10 m?

Answer 1

The total work done will be zero.

Step-by-step explanation:

Given that,

Mass = 100 kg

Force = 392 N

Velocity = 20 m/s

Distance s= 10 m

We need to calculate the work done

Using balance equation

The net force will be

`F'=F-\mu mg`

`F'=392-0.4*100*9.8`

`F'=0`

The net force is zero.

Hence, The total work done will be zero by all forces on the object.