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Tracy (of mass 54 kg) and Tom (of mass 69 kg) are standing at rest in the center of the roller rink, facing each other, free to move. (Help)

1)
Tracy (of mass 54 kg) and Tom (of mass
69 kg) are standing at rest in the center of the
roller rink, facing each other, free to move.
Tracy pushes off Tom with her hands and re-
mains in contact with Tom?s hands, applying a constant force for 0.
7 s. Tracy moves 0.4 m during this time. When she stops pushing off
Tom, she moves at a constant speed. What is Tracy?s constant acceleration during her time of contact with Tom?

2)
What is Tracy?s final speed after this con-
tact?

3)
What force was applied to Tracy during
this time?

4)
What is correct about Tom?s motion?
1.
Tom?s acceleration is smaller.
2.
Tom?s acceleration is greater.
3.
Tom?s final velocity is greater than
Tracy?s.
4.
The force acting on Tom is greater than
the force acting on Tracy.

Report as

Use Force = mass x acceleration You have the mass. Now you need the acceleration. You are accelerating from time 0 s to 0.7 s a distance of 0 meters to 0.4 meters. Since you are starting at zero, then you need some energy to get to 0.4 meters, that's acceleration. It would be unfair for me to do your homework for you.