John’s mass is 93.3 kg, and barbara’s is 50.1 kg. he is standing on the x axis at xj = +9.03 m, while she is standing on the x axis at xb = +3.36 m. they switch positions. how far and in which direction does their center of mass move as a result of the switch? distance m

 It moves 1.71m to the left.

Explanation:

The intial position of the center of mass is:

The final position of the center of mass is:

The displacement between these positions is:

Δr = 5.34m - 7.05m = -1.71m

This means it moves 1.71m to the negative x-axis

correct it is c.) b b

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.