Question

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 . -1.0 m/s2 1.0 m/s2 -5.0 m/s2 5.0 m/s2 0.24 m/s2 NextReset

Answer 1

Answer: The acceleration of the ball during collision is $-5.0m/s^2$

Explanation: We are given that the ball was moving with a velocity of 0.6m/s before the collision and after the collision, the velocity becomes -0.4m/s.

The time taken for the collision is 0.2 seconds.

To calculate the acceleration of the ball, we use first equation of motion, which is:

$v=u+at$

where, v = final velocity = -0.4m/s

u = initial velocity = 0.6m/s

a = acceleration = ?

t = time taken = 0.2 sec

Putting values in above equation, we get:

$-0.4=0.6+a\times 0.2\\\\a=-5.0m/s^2$

Answer 2

Its velocity changes by 1 m/s in the negative direction over a time of 0.2 seconds. -1/0.2= -5m/2^2