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A rocket has a take-off mass of 3.5 × 10⁴ kg and is launched vertically upward with an initial acceleration of 10 m/s². The initial thrust produced by the rocket is

1. 3.5 × 10⁵ N
2. 7.0 × 10⁵ N
3. 14.0 × 10⁵ N
4. 1.75 × 10⁵ N

Correct answer: 7.0 × 10⁵ N

Solution

Thrust - mg = ma, so Thrust = m(g+a) = 3.5e4 * (10+10) = 7.0 x 10^5 N.

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