Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false :
The potential energy of a body of mass 1 kg kept at a height of 1 m is 1 J.
Advertisements
उत्तर
The given statement is false.
We know, PE = mgh
So, for h = 1 m, m = 1 kg and g = 9.8 m/s2 the PE is = (1)(9.8)(1) = 9.8 J
APPEARS IN
संबंधित प्रश्न
Two bodies A and B of masses 10 kg and 20 kg respectively are at the same height above the ground. Which of the two has greater potential energy?
A bucket full of water is on the first floor of your house and another identical bucket with the same quantity of water is kept on the second floor. Which of the two has greater potential energy?
A body of mass m is moved from ground to a height h. If force of gravity on mass of 1 kg is g newton, find the work done in lifting the body.
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.
The potential energy of a body is the energy by virtue of its ______.
A body falls freely under gravity from rest. Name the kind of energy it will possess at the point from where it falls.
A weightlifter is lifting weights of mass 200 kg up to a height of 2 metres. If g = 9.8 m s−2, calculate :
work done by the weightlifter
Explain by an example what is meant by potential energy. Write down the expression for gravitational potential energy of a body of mass m placed at a height h above the surface of the earth.
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?
Which of the following is the example potential energy?
