Advertisements
Advertisements
प्रश्न
A body is falling from a height of h. After it has fallen a height `"h"/2`, it will possess
विकल्प
only potential energy
only kinetic energy
half potential and half kinetic energy
more kinetic and less potential energy
उत्तर
more kinetic and less potential energy
Explanation:
When a body falls from a height `"h"/2` its potential energy becomes half (as potential energy = mgh ). The rest half of the initial potential energy gets converted into kinetic energy.
Hence, the body will possess half potential energy and half kinetic 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 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.
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.
Define the term potential energy of a body.
A body at a height possesses ______.
Is potential energy a vector or a scalar quantity?
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
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)
The energy, possessed by an object due to its position is called ______.