Which is the best example of translational motion? a. a soccer ball passed between two players. b. a powered up rocket on the launch pad. c. an ice skater spinning in place. d. water molecules in a glass of water.

In translational motion we know that object moves in a straight line in such a way that all points of the object will have same speed in same direction

So here in all given option we have to choose such an example which will have constant same speed in same direction.

A) a soccer ball passed between two players.

So this is the best example of translational motion is we consider that ball is not rolling on the ground and moving straight to other player

B) a powered up rocket on the launch pad.

Powered up rocket will always moved in parabolic or elliptical path when it starts the motion

C)an ice skater spinning in place.

Spinning motion never considered as translational motion because it is not in straight line

D).water molecules in a glass of water.

Motion of water molecules are random motion and all molecules moves randomly in all directions

to treat tumors in the body