A person can run 180 m in 488 s. At what speed are they running?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Photons with the highest energy have the longest period

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?