A 2-kg block is thrown upward from a point 20 m above earth's surface. At what height above earth's surface, the gravitational potential energy of the block is increased by 500 J?

5 m

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25 m

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45 m

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70 m

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Solution

The correct option is C 45 m
Initial P.E = 2×10×20=400
Required P.E = Initial P.E + 500 = 400+500=900
Let ,height=h,Then 2×10×h = 900
h = 45m.

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A 2-kg block is thrown upward from a point 20 m above earth's surface. At what height above earth's surface, the gravitational potential energy of the block is increased by 500 J?

The correct option is C 45 mInitial P.E = 2×10×20=400Required P.E = Initial P.E + 500 = 400+500=900Let ,height=h,Then 2×10×h = 900 h = 45m.

The correct option is C 45 m
Initial P.E = 2×10×20=400
Required P.E = Initial P.E + 500 = 400+500=900
Let ,height=h,Then 2×10×h = 900
h = 45m.