1.

Find the initial velocity of a car if it can be a stop in 10 second by applying brakes which provide it a retardation of 2.5m/s².

Answer» U = ?
V = 0
t = 10s
a = -2.5 m/s²

v = u +at
⇒ 0 = u + (-2.5)×10
⇒ 0 = u - 25
⇒ u = 25 m/s

Initial VELOCITY was 25 m/s




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