Question

A car accelerated from 45 m/s to 0 m/s in 10 seconds. what is the average acceleration of the car?

Answer 1

Average acceleration is- 4.5
`(m)/(s^(2) )`

Given:

`v_(1)` = 45 m/s

`v_(2)` = 0 m/s

t = 10 s

To find:

Average acceleration = ?

Formula used:

Average acceleration =
`(\Delta v)/(\Delta t)`

Solution:

Average acceleration is given by,

a = =
`(\Delta v)/(\Delta t)`

a =
`(0 - 45)/(10)`

a = - 4.5
`(m)/(s^(2) )`

Thus average acceleration is - 4.5
`(m)/(s^(2) )` . Negative sign shows that it is deceleration.