Question

Explain why it is difficult for someone to lift an object with a mass of 50kg or more from the ground.

Answer 1

It is difficult for someone to lift an object with a mass of 50kg or more from the ground because the force of gravity acting on the object is greater than the force that the person can exert on the object. The force of gravity increases with the mass of the object, so the greater the mass, the greater the force of gravity and the harder it is to lift the object.