If you drive at a velocity of 70 km/h for 8 kilometers and then walk another 2 kilometers in 40 minutes, what was your average velocity?

Why does lightning travel from clouds to the ground?

Ain is , is 's of ? 0.62 0.79 1.27 1.50

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.