find the average force needed to accelerate a car weighing 500 kg from rest to 72 km per hour in a distance of 25 m
find the average force needed to accelerate a car weighing 500 kg from rest to 72 km per hour in a distance of 25 m
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= [(72 × 5/18 m/s)^2 - 0] / (2 × 25 m)
= 400 / 50 m
= 8 m/s^2
F = m a
= 500 kg × 8 m/s^2
= 4000 N
= 4 kN
Average Force needed is 4 kN