Question

*Please Check my answers*
A man is exercising and running into a exercise rubber band with a velocity of 20m/s. This causes him to decelerate at a rate of 4m/s^2 until the rubber band stops and brings him back the other way at the same acceleration to the spot that he originally started at the rubber band.


1.What is the time frame that he will be touching the exercise band?
2.What is his final velocity when the exercise band releases him?
3.What is the distance the exercise band is stretched by the man?

Can you check my answers?
1)5 sec
2)20m/s
3)56.25 meters

Answer 1

@zepdrix

Answer 2

@mathstudent55

Answer 3

@Compassionate

Answer 4

1. and 2. are good.

Where did you get 3?

\[v _{f}^{2}=v _{i}^{2}+2ad\]

Try that.

Answer 5

I got 50 meters, is that right? @NoelGreco

Answer 6

Yes.