a. V = 36000m/h / 3600s/h = 10 m/s.
a = (Vf-Vo) / t = (20-10) / 5=2 m/s^2
Fn = ma = 1000 * 2 = 2000 N.
(a) What is the acceleration of a car in m/s² that doubles its speed from 36.0 km/h in 5.00 s?
(b) What net force acted on this car if its mass was 1,000.0 kg?
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