100 J of gravitational potential energy is stored in an object, which is dropped. How much kinetic energy will the object have just before it hits the ground? you many ignore air resistance and friction.

a) 200 J
b) 100 J
c) 50 J
d) 0 J

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

Explain what will happen if decomposers were apsent from a forest ecoysystem.