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प्रश्न
A body is falling from a height of h. After it has fallen a height `"h"/2`, it will possess
पर्याय
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.
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संबंधित प्रश्न
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
State two factors on which the potential energy of a body at a certain height above the ground depends.
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?
Two bodies of same masses are placed at heights h and 2h. Compare their gravitational potential energy.
Define the term potential energy of a body.
A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. The correct statement is:
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.
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.
Give one example each of a body possessing : (i) kinetic energy, and (ii) potential energy.
If 784 J of work was done in lifting a 20 kg mass, calculate the height through which it was lifted. (g = 9.8 m/s2)
