Changes in motion
By deyson
Momentum
The combination of the mass and the speed of an object is momentum.A baseball has more momentum than a tennis ball travaling the same speed because the baseballhas more mass
weighleness
Skydrivers experience feeling of weighleness, the state of begin without detectable weight
Energy
Theabillity to do work.If work is to accomplishe,energyis needed.Like work,energy is measured in joules. streched rubber band or wound up springs store energy because of their electricity.A rock on the edge of a cliff stores energy