The amusement park ride consists of a 200-kg car and passenger that are traveling at 3 m> s along a circular path having a radius of 8 m. if at t = 0, the cable oa is pulled in toward o at 0.5 m> s, determine the speed of the car when t = 4 s. also, determine the work done to pull in the cable.

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

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?

Which of the following best describes the circuit shown below?