Question

Using this formula Vj = V; + at, If a vehicle starts from rest

and accelerates forward at 4.5 m/s2 for 85, what is the final
velocity of the vehicle?

Answer 1

The final speed of the vehicle is 36 m/s

Step-by-step explanation:

Uniform Acceleration

When an object changes its velocity at the same rate, the acceleration is constant.

The relation between the initial and final speeds is:

`v_f=v_o+a.t`

Where:

vf = Final speed

vo = Initial speed

a = Constant acceleration

t = Elapsed time

The vehicle starts from rest (vo=0) and accelerates at a=4.5 m/s2 for t=8 seconds. The final speed is:

`v_f=0+4.5*8`

`v_f=36\ m/s`

The final speed of the vehicle is 36 m/s