Advertisements
Advertisements
प्रश्न
A body of mass m is moved from ground to a height h. If the force of gravity on mass of 1 kg is g newton, find the force needed to lift the body.
Advertisements
उत्तर
When a body of mass m at A on the ground is raised above ground through height h at B force is applied. This force applied = weight of body
Force on mass m = F = m g
Where ‘g’ is the force of gravity on a mass of 1 kg.
APPEARS IN
संबंधित प्रश्न
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
Two bodies of same masses are placed at heights h and 2h. Compare their gravitational potential energy.
Find the gravitational potential energy of 2.5 kg mass kept at a height of 15 m above the ground. The force of gravity on mass 1 kg is 10 n.
A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. The correct statement is:
What happens to the potential energy of a body when its height is doubled?
A weightlifter is lifting weights of mass 200 kg up to a height of 2 metres. If g = 9.8 m s−2, calculate :
potential energy acquired by the weights.
A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate the amount of work done by him. How much potential energy does he gain? (g = 9.8 m/s2)
What is the difference between gravitational potential energy and elastic potential energy? Give one example of a body having gravitational potential energy and another having elastic potential energy.
A man is instructed to carry a package from the base camp at B to summit A of a hill at a height of 1200 metres. The man weighs 800 N and the package weighs 200 N. If g = 10 m/s2,
- how much work does man do against gravity?
- what is the potential energy of the package at A if its is assumed to be zero at B?
The energy, possessed by an object due to its position is called ______.
