Question

Question #f826d

Answer 1

I got: `-6.3m/s^2`

Explanation:

We can use the general relationship from Kinematics:
`v_f=v_i+at`
Where:
`v_f=0` is the final velocity;
`v_i=38m/s` is the initial velocity;
`t=6s` is time;
`a=?` is the acceleration.

We get:

`0=38+6a`

`a=-38/6=-6.3m/s^2`

Where the minus sign tells us that this acceleration opposes the motion reducing continuously the velocity until the object stops.