Draw the free body diagrams for the following objects: a.) A ball in free fall.
b.) A block moves at a constant velocity on a horizontal surface.
C.) A block is at rest on an inclined surface at an angle (friction is not negligible).

chemical properties of thing

momentum of soft ball three times less than baskey ball

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me