What is the mass of the load in kg?

Question

A load is being lifted using a rope and pulley. When the tension applied to the rope is 20N, the load rises with uniform speed. Friction is neglected.

Answer 1

Depends on the value you take for G. The Formula is

Mass x Gravity = Force.

Because the load is moving with uniform speed, the forces are balanced. This means the force pulling it up is the same as the force pulling it down. In this case the force exerted by the load is 20N.

Force divided by Gravity will give you the mass. So if I take Gravity to be 10N/Kg (9.8 is more accurate), then the mass of the load is:

20N / 10N/Kg = 2Kg.

The load is 2 Kg.