A sledge of mass 80 kg moves over a frozen surface of a lake with the velocity of 30m/s and comes to rest in 5s. calculate its retardation.
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u= 30 m/s
v =0
t = 5 sec
as, v = u + at
⇒0 = 30 + a×5
⇒5a = -30
⇒a = - 6 m/s²
retardation is 6 m/s²
v =0
t = 5 sec
as, v = u + at
⇒0 = 30 + a×5
⇒5a = -30
⇒a = - 6 m/s²
retardation is 6 m/s²
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