1.

A car is travelling with the velocity of 72 kom h-! If brakes appliedproduce uniform retardation of 10 m 52 calculate the time taken by it to stop.​

Answer»

Answer:

t = 2sec

Explanation:

RETARDATION (a) = -10m/s²

Velocity (v) = 72km/h => 72×5/18 => 20m/s

Initial velocity (u) = 0

TIME (t) = ?

We know ,

★ v = u + at ★

20 = 0 + -10 × t

➞ 20 = -10T

➞ t = 20/10

t = 2sec



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