Q. 73

Expert-verifiedFound in: Page 291

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

A rocket in deep space has an empty mass of 150 kg and exhausts the hot gases of burned fuel at 2500 m/s. It is loaded with 600 kg of fuel, which it burns in 30 s. What is the rocket’s speed 10 s, 20 s, and 30 s after launch?

At t = 10s, speed is equal to 775.5 m/s

At t = 20s, speed is equal to 1905.3 m/s

At t = 30s, speed = v_{max} = 4023.5 m/s

We need to calculate the rocket’s speed 10 s, 20 s, and 30 s after launch.

Rate of burning fuel :

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