Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 129 - 133 of 285

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Question number: 129

» Physics » Work, Energy & Power

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Question

If a ball of mass is freely fallen from the top of a tower of height , then its kinetic energy after will be:

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Choice (4)Response

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Question number: 130

» Physics » Sound

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If ripples produced in in a pond of water, then time period and the frequency of ripple formation are respectively:

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Question number: 131

» Physics » Work, Energy & Power

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A spring has an initial stretch . The stretch is increase and becomes 45 cm. If force constant of the spring is , then increase in potential energy is about:

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Choice (4)Response

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Question number: 132

» Physics » Force & Laws of Motion

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Two object of masses and are moving along the same line and direction with velocities of and respectively.

They collide and after the collision the first object moves at a velocity of . Determine the velocity of the second object.

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Question number: 133

» Physics » Work, Energy & Power

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A block of mass is taken to a height above the earth’s surface, where is the radius of the earth. If the body is now raised through a height , the potential energy increase by:

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Choice (4)Response

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None of the above

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