Suppose you have made the following hypothesis:
sharks are most common near coral reefs, because there are more fish there to eat.
what type of evidence would be most to gather to test this hypothesis?

What object a collides with object b and bounces back its final momentum is?

What is friction? how does it affect the motion of an object?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?