Can someone help me with these science questions?

Below

Explanation:

1. To find the ball's acceleration we can use this formula :

     vf = vi + at

Because the ball comes to a stop, the vf is 0 :

     0 = 12 + a(36)

  - 12 = a36

  - 0.33 m/s^2 [ forward ] = a

^^note that this is negative acceleration because it is slowing down!

2. We can use that same formula for this question :

     vf = vi + at

     45 = 85 + a(4.5)

    - 40 = a4.5

    - 8.9 m/s^2 [ up ] = a

3. It is all of the above!

     Well, when a plane is moving, this means that it will have both speed and velocity. But on the runway, the plane is also accelerating because it is getting faster due to the force of the engines!

4.  This one is an example of speed!

     Because there was no direction given, this means that this is a scalar quantity! Velocity and acceleration are both vector quantities that have both magnitude and direction. Speed is a scalar quantity that only has magnitude.

Hope this helps! Best of luck <3

answer: b.

explanation: