A ball is moving right a 6m/s. it bounces off of a wall and begins moving left at 2 m/s how much did its velocity change?

HELL

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev, respectively?

How to calculate voltage drop in a series circuit

What is an electric motor? explain its operation. 2-3 sentence