Body weight 10kg with what force acted on the body if, in 20 minutes, it changed its speed from

Body weight 10kg with what force acted on the body if, in 20 minutes, it changed its speed from 2.5 km / h to 180 km / h.

m = 10 kg.

t = 20 min = 1200 s.

V0 = 2.5 km / h = 0.96 m / s.

V = 180 km / h = 50 m / s.

F -?

According to Newton’s 2 law, the force F, which acts on a body, is equal to the product of the body’s acceleration a by its mass m: F = m * a.

The acceleration of the body a shows how quickly the speed of the body changes, and is determined by the formula: a = (V – V0) / t, where V, V0 are the final and initial speed of the body, t is the time during which the speed changes.

The formula for determining the force will take the form: F = m * (V – V0) / t.

F = 10 kg * (50 m / s – 0.96 m / s) / 1200 s = 0.4 N.

Answer: a force F = 0.4 N. acts on the body.