Question

a car moving at 30.0 m/s slows uniformly to a speed of 10.0 m/s in a time of 5.00 s determine the. acceleration of the car

Answer 1

Answer:
`-4m/s^(2)`

Step-by-step explanation:

Acceleration
`a` is defined as the variation of Velocity
`\Delta V` in time
`\Delta t` :

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

In this case
`\Delta V=10m/s - 30m/s` and
`\Delta t=5 s`.

Therefore:

`a=(10m/s - 30m/s)/(5 s)`

`a=(-20m/s)/(5 s)`

`a=-4 m/s^(2)` Note the negative sign indicates the car is slowing