# Category: Gravity and Gravitation

Gravitation Reasonings

## A body of mass m is hanging from the hook of a spring balance and the balance is also hanging from the ceiling of a freely falling elevator. What will be the reading on balance?

Gravitation Reasonings

## If an earth satellite moves to a lower orbit there is some dissipation of energy, and yet its speed increases. Explain.

Gravitation Reasonings

## The acceleration due to gravity on a planet is 196 cm/s². If it is safe to jump from a height of two metres on earth, what will be the corresponding safe height on the planet?

Gravitation Reasonings

## Which takes more fuel, a voyage from the earth to the moon or from the moon to the earth? Explain.

Gravitation Reasonings

## If the sun somehow collapsed to form a black hole, what effect would this event have on the orbit of the earth?

Gravitation Reasonings

## A thief weighing 60 kg jumps from the window of a house with a box of 40 kg in his hand. How much weight of the box will he experience?

Gravitation Reasonings

## The acceleration of a falling body is measured inside an elevator travelling at constant speed 9.8 m/sec. What result is obtained?

Gravitation Reasonings

## How do the K.E. and P.E. of a satellite change when it moves around the earth in elliptical orbit?

Gravitation Reasonings

## In circular orbit, the satellite of earth has same K.E. and P.E. everywhere. Why?

Gravitation Reasonings

## Generally, the path of a projectile from the surface of earth is parabolic but it is elliptical for projectiles going to a very great height. Why?

Gravitation Reasonings