A rocket with a mass of 10 kg begins its motion from a state of rest under the influence of a constant force of 500N

A rocket with a mass of 10 kg begins its motion from a state of rest under the influence of a constant force of 500N (newtons). how much seconds, the rocket speed will be equal to 20m / s.

Data: m (rocket mass) = 10 kg; F (constant force acting on the rocket) = 500 N; V (the speed that the rocket should develop) = 20 m / s; V0 = 0 m / s (movement started from a state of rest).

1) Let’s calculate the acceleration with which the rocket picks up speed, using Newton’s second law:

a = F / m = 500/10 = 50 m / s ^ 2.

2) We calculate the time for the rocket to reach the required speed:

V = V0 + a * t = 0 + a * t.

t = V / a = 20/50 = 0.4 s.

Answer: The rocket will reach the required speed of 20 m / s in 0.4 s.