2.3 An object traveling on a number line moved from the Om position to the -10 m position and then to the +5 m position in 20 s. Determine the average velocity of the object.

In science and physics what is the standard unit of measure for speed?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?