GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?
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0.26 m
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0.52 m
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5.2 m
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25 m
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Explanation:
Detailed explanation-1: -The total mechanical energy of the ball is E=25 J E = 25 J . The kinetic energy at the said point is Ek=17 J E k = 17 J . The gravitational potential energy Eg equals the total mechanical energy of the system minus the kinetic energy, i.e. The potential energy of the ball is 8 Joules.
Detailed explanation-2: -(a) Potential energy of the ball at the ground is mgh. (b) Kinetic energy of the ball at the ground is zero.
Detailed explanation-3: -At an object’s maximum height, kinetic energy is zero/maximum while the potential energy is zero maximum.
There is 1 question to complete.