The work done to hold a weight of 20 kg at a height of 1 m above the ground is zero Joules. When an object is held stationary, there is no displacement, so no work is done against gravity.
Discussion Forum Latest Questions
An astronaut can jump higher on the lunar surface than on the Earth’s surface because the force of gravity on the lunar surface is very less as compared to the Earth’s surface. This weaker gravity allows the astronaut to exert ...
Body weight varies with location on Earth’s surface due to differences in gravitational acceleration. It is maximum at the poles due to being closer to the Earth’s center, and minimum at the equator due to the centrifugal force caused by ...
As we move from the equator towards the poles, the value of g decreases. This is because the centrifugal force due to Earth’s rotation is greatest at the equator, causing a slight outward push that counteracts some of the gravitational ...
When a person lands on the Moon, there is a change in weight. Weight is the force exerted on an object due to gravity, and since the Moon has less gravity than Earth, the person’s weight decreases. However, their mass ...