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प्रश्न
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
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उत्तर
Law of conservation of energy is used in answering these questions.
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संबंधित प्रश्न
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
A pendulum is oscillating on either side of its rest position. The correct statement is:
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
What type of energy is possessed : by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
What type of energy is possessed : by the stretched rubber strings of a catapult?
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Name the device or machine which convert :
Light energy into electrical energy.
A ball falls to the ground as shown below :
What is the kinetic energy of ball when it hits the ground?
Which one of the following is not the unit of energy?
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
