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Question

The escape velocity of 10g body from the earth is 11.2kms−1. Ignoring air resistance, the escape velocity of 10kg of the iron ball from the earth will be

A
0.0112kms1
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B
0.112kms1
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C
11.2kms1
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D
0.56kms1
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Solution

The correct option is C 11.2kms1
Escape velocity is independent of the mass of the projected body provided the air resistance is neglected. Hence, the escape velocity of 10kg10kg of the iron ball projected from the earth is same that of escape velocity of 10g10g projected from the earth i.e., 11.2kms1

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