Question

Note: the 2 in the answers are exponents

In a video game, a ball moving at 0.6 meter/second collides with a wall. After the collision, the velocity of the ball changed to -0.4 meter/second. The collision takes 0.2 seconds to occur. What’s the acceleration of the ball during the collision? Use .
A.) -1.0 m/s2

B.) 1.0 m/s2

C.) -5.0 m/s2

D.) 5.0 m/s2

E.) 0.24 m/s2

Answer 1

Final speed after collision with the wall

`v_f = -0.4 m/s`

before collision the speed of ball initially

`v_i = 0.6 m/s`

time taken for the collision

`\Delta t = 0.2 s`

now as per the formula of acceleration we know that

`a = (v_f - v_i)/(\Delta t)`

now plug in all values in it

`a = (-0.4 - 0.6)/(0.2)`

`a = -5.0 m/s^2`

so acceleration is - 5 m/s/s for above situation