Average Force Calculator:
Enter the values of mass of the object, m(kg), change in velocity, (Vf – Vi)(m/s) and time, t(s) to determine the value of average Force, Favg(N).
Average Force Formula:
Average force is a concept in physics that measures the constant force applied over a period of time to cause a change in an object’s momentum.
Average Force, Favg(N) in Newtons, is calculated by multiplying the mass of the object, m(kg) in kilograms by the change in velocity, (Vf – Vi)(m/s) in meters per second, over the time, t(s) in seconds.
Average Force, Favg(N) = m(kg) * (Vf – Vi)(m/s) / t(s)
Favg(N) = average force in Newtons, N.
m(kg) = mass of the object in kilogram, kg.
(Vf – Vi)(m/s) = change in velocity in metre per second, m/s.
t(s) = time in second, s.
Average Force Calculation:
- Mass of the football 0.45 kg. Initial velocity 0 m/s (the ball is stationary). Final velocity 30 m/s (speed of the ball after the kick). Time of contact with the foot 0.05 s.
Given: m(kg) = 0.45kg, (Vf – Vi)(m/s) = (30 – 0), t(s) = 0.05s.
Average Force, Favg(N) = m(kg) * (Vf – Vi)(m/s) / t(s)
Favg(N) = 0.45 * (30 – 0) / 0.05
Favg(N) = 270N.
- Suppose a car applies brakes and comes to a stop from a speed of 20m/s to 0m/s in 5 seconds. If the braking force applied is 1000 Newtons, what is the mass of the car?
Given: Favg(N) = 1000N, (Vf – Vi)(m/s) = (0 – 20), t(s) = 5s.
Average Force, Favg(N) = m(kg) * (Vf – Vi)(m/s) / t(s)
m(kg) = Favg(N) * t(s) / (Vf – Vi)(m/s)
m(kg) = 1000 * 5 / -20
m(kg) = -250kg