A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum: (1) just after it is dropped (2) when it is just on the half-way (3) just before it touches the ground (4) when it touches the ground

A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum: (1) just after it is dropped (2) when it is just on the half-way (3) just before it touches the ground (4) when it touches the ground
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(3) just before it touches the ground Explanation: When an object reaches the ground it has its maximum value of kinetic energy just before touching the ground. Since kinetic energy + potential energy= Constant; so on reaching ground the potential energy of an object becomes zero (0). The kinetic energy on reaching ground becomes maximum.
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A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum: (1) just after it is dropped (2) when it is just on the half-way (3) just before it touches the ground (4) when it touches the ground

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Last Answer : just before it touches the ground

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A girl throws a 2 kilogram rock vertically upward. It reaches a maximum height of 5 meters. What is the kinetic energy of the rock the instant it leaves the girl's hand?

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A lady dropped her wallet in the parking lot of a super market. A boy picked the wallet up and ran towards the lady. He set off at 60° to the verge

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Last Answer : 8.8 m s-2

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Find the temperature at which the everage thermal kinetic energy is equal to the energy needed to take a hydrogen atom from its ground state `n = 3` s

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