A rocket with a liftoff mass 3.5 × 10^4kg is blasted upwards with an initial acceleration of 10m/s^2 .
A rocket with a liftoff mass 3.5 × 104kg is blasted upwards with an initial acceleration of 10m/s2 . Then the initial thrust of the blast is
(a) 3.5 x 105N
(b) 7.0 x 105N
(c) 14.0 x 105N
(d) 1.75 x 105N
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(a) : Initial thrust = (Lift off mass) × acceleration
= (3.5 x 104) x (10) = 3.5 x 105N.
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