Question

A car traveling at 15 m/s starts to accelerate after 3 seconds. What is the car's acceleration?

Answer 1

Explanation:

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Answer 2

Given :

v ( final velocity ) = 0 m/s

u ( initial velocity ) = 15 m/s

t ( time ) = 10 sec

To find :

Acceleration

Solution :

We know that,

:  a =  

:  a = -1.5 m/s²

[ here negative sign shows opposite direction ]

Hence, acceleration is -1.5 m/s²

Acceleration is the rate of change of velocity.

Its S.I unit is m/s².

It is of three types :

★ Negative acceleration

★ positive acceleration

★zero acceleration