Advertisements
Advertisements
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?
उत्तर
Body A Body B
P.`E_1`=`m_1`gh P.`E_2`=`m_2`gh
P.`E_1`=10×gh P.`E_2`=20 ×gh
As g is constant and h is the same in both the cases
Pe2 is greater than PE.
Hence, Potential energy of body B (more mass) is greater than the P.E. of body A.
Or
As the height of body A and is same and ‘g’ is constant, the body with greater mass i.e. body B has greater potential energy.
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.
State two factors on which the potential energy of a body at a certain height above the ground depends.
Write the expression for the gravitational potential energy explaining the meaning of the symbols used.
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 potential energy stored in 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.
A spring is kept compressed by a small trolley of mass 0.5 kg lying on a smooth horizontal surface as shown in the adjacent fig. When the trolley is released, it is found to move at a speed v = 2 m s-1. What potential energy did the spring possess when compressed?
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?
Prove that the kinetic energy of a freely falling object on reaching the ground is nothing but the transformation of its initial potential energy.
The potential energy of your body is least when you are ______.
Which of the following is the example potential energy?
