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?
Advertisements
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
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
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?
Write the expression for the gravitational potential energy explaining the meaning of the symbols used.
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?
To what height should a box of mass 150 kg be lifted, so that its potential energy may become 7350 joules? (g = 9.8 m/s2)
A body of mass 2 kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2 s? (Assume g = 10 m/s2).
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.
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.
When a ball is thrown vertically upwards, its velocity goes on decreasing. What happens to its potential energy as its velocity becomes zero?
What energy is possessed by stretched rubber?
