Laws of Motion
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Question : 9
Total: 40
A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s– 2
Solution:
Here, M = 20,000 kg;
Initial acceleration = 5 m s– 2
The rocket moves up against gravity.
Therefore, the blast has to produce a total acceleration given by
a = 10 + 5 = 15 m s − 2
Hence, the initial thrust of the blast,
F = m a
= 20 , 000 × 15
= 3 × 10 5 N
Initial acceleration = 5 m s
The rocket moves up against gravity.
Therefore, the blast has to produce a total acceleration given by
Hence, the initial thrust of the blast,
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