Crall decides that with the kinematic equations of motion and the value of g (9.81 m/s2) she should be able to make quantitative predictions of the ball's motion. she decides to release the ball at a height of 40 m above the ground and that she wants the ball to hit the ground at time 4 s later. she then calculates the speed the elevator needs to be traveling in order for the ball to reach the ground at this time. which is the correct result of crall's calculation? −9.6 m/s 29.6 m/s

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.