A rock is dropped from rest from a height h above the ground. It falls and hits the ground with a speed of 11 m/s. From what height should the rock be dropped so that its speed on hitting the ground is 22 m/s? Neglect air resistance. 1.4h 4.0h O 0.71h O2.0h 03.0h

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Chapter1: Units, Trigonometry. And Vectors
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A rock is dropped from rest from a heighth above the ground. It falls and hits the ground with a speed of 11 m/s. From what height
should the rock be dropped so that its speed on hitting the ground is 22 m/s? Neglect air resistance.
1.4h
4.0h
0.71h
2.0h
3.0h
Transcribed Image Text:A rock is dropped from rest from a heighth above the ground. It falls and hits the ground with a speed of 11 m/s. From what height should the rock be dropped so that its speed on hitting the ground is 22 m/s? Neglect air resistance. 1.4h 4.0h 0.71h 2.0h 3.0h
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