Tyson throws a shot put ball weighing 7.26 kg. at a height of 2.1 m above the ground, the mechanical energy of the ball is 172.1 j. what is the velocity of the ball at the given point? m/s

What is work? how much work is done to move an object 0 meters?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.