Question

A car moving 20 m/s accelerates at 3 m/s for 5 seconds. what is the final velocity?

Answer 1

The final velocity is of the car is 35
`ms^(-1)`.

Step-by-step explanation:

The car initially moves in the velocity 20
`ms^(-1)`. It then accelerated by 3
`ms^(-2)` for 5 seconds.

The formula to find final velocity,
`v_f=v_i+a(t).`

`v_i`: initial velocity of the car.

a: acceleration rate.

t: time.

`v_f`: final velocity

From the given information,

`v_i`= 20
`ms^(-1)`.

a=3
`ms^(-2)`.

t= 5s.

`v_f`=20+3(5).

=20+15.

=35
`ms^(-1)`.

∴The final velocity of the moving car is 35
`ms^(-1)`.