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Eamcet Physics
1 st Year : Unit 3.1( Laws of Motion ) - Laws of Motion

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A 5000 kg rocket is set for vertical firing. The exhaust speed is 800ms^-1. To give an upward acceleration of 20ms^-2, the amount of gas ejected per second to supply the needed thrust is (g = 10ms^-2)

A. 127.5kg s^-1

B. 137.5kg s^-1

C. 187.5kg s^-1

D. 185.5kg s^-1y

E. None of the above

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Correct choice: C

Explanation:

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Eamcet Physics 1 st Year : Unit 3.1( Laws of Motion ) - Laws of Motion

Eamcet Physics
1 st Year : Unit 3.1( Laws of Motion ) - Laws of Motion