when brakes are applied to a bus the retardation produced is 25 cm/s^2 and the bus takes 20s to stop. calculate the initial velocity
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apply eqn of motion i.e v=at
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v=0
a = 25 cm/s^2 = 0.25 m/s^2
t = 20 s
From 1st equation of motion,
v = u + at
0 = u + (-0.25) 20
0 = u - 5
Therefore,
u = 5 m/s .
a = 25 cm/s^2 = 0.25 m/s^2
t = 20 s
From 1st equation of motion,
v = u + at
0 = u + (-0.25) 20
0 = u - 5
Therefore,
u = 5 m/s .
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