Which factor can decrease the kinetic energy of an object? (3 points) Increase in speed Decrease in speed Increase in temperature Decrease in volume

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

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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?