A 25 kg rock falls for 4.5 seconds. How many meters tall was the building?
Assume no air resistance, answer using two place values

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

What is the momentum of a 2 kg object moving at 15 meters per second

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four