A rocket with a mass of 10 kg begins to move from a state of rest under the influence of a constant force of 500 Newtons. In how many seconds the speed of the rocket will become equal to 20 m per second.
To determine the duration of the acceleration of a given rocket, we will use the formula for calculating the impulse of force: F * t = m * V – m * V0 = m * V – 0, whence t = m * V / F.
The values of the variables: m is the mass of the rocket (m = 10 kg); V is the required speed (V = 20 m / s); F – constant acting force (F = 500 N).
Let’s make a calculation: t = m * V / F = 10 * 20/500 = 0.4 s.
Answer: The given rocket will accelerate to 20 m / s in 0.4 s.
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