A car weighing 4 tons in 20 seconds increased its speed from 32.4 km / h. Determine the force imparting acceleration to the vehicle.
m = 4 t = 4000 kg.
t = 20 s.
ΔV = 32.4 km / h = 9 m / s.
According to 2 Newton’s law, the force F, which acts on a body, is equal to the product of the body’s mass m by the acceleration of the body a, which this force imparts to it: F = m * a.
The acceleration of the body is a vector physical quantity that shows the rate of change in the speed and is determined by the formula: a = ΔV / t, where ΔV is the change in the speed of the body, t is the time during which the speed of the body changes.
The formula for determining the force will take the form: F = m * ΔV / t.
F = 4000 kg * 9 m / s / 20 s = 1800 N.
Answer: a force F = 1800 N acts on the car.
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