Pilings are driven into the ground at a building site by dropping a 2050 kg object onto them. What change in gravitational potential energy does the object undergo if it is released from rest 17.5 m above the ground and ends up 1.00 m above the ground? change in gravitational potential energy: ___ J?

Will you chech and finish these for me, because i am stumped with them.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.