sarahhtsvetkovs
29.01.2021 •
Physics
A car of mass 1500 kg of moving at 20 m/s when a constant breaking force of 3000N is applied. How long does it take to stop the car?
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Ответ:
1.5 m/s2
Explanation:
U = 0 m/s ( from rest)
t = 20 s
S = 300 m
S = ut + 1/2 * a * t2
300 = 0 + 1/2 * a * 20*20
a = 1.5m /s2