Q.

A rocket with a lift-off mass 3.5 x 104 kg is blast upward with an initial acceleration of 10 ms-2. Then, the initial thrust of the blast is [AIIMS 2012] 

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a

14x105 N

b

3.5 x 105 N

c

1.75 x 105 N

d

7x105 N

answer is C.

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Detailed Solution

Initial thrust must be

m(g+a)=3.5×104(10+10)=7×105 N

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