1.

A car moving with a uniform velocity of 20 metre per second come to waste on the application of brakes after travelling distance 10 metre find the acceleration

Answer»

ANSWER:

-20 m/s²

Explanation:

USE equation of motion

a = (v² - u²) / (2S)

= (0² - 20²) / (2 × 10)

= -400 / 20 m/s²

= -20 m/s²

Negative SIGN indicates that it's retardation.



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