Which of the following statements is not true about the centroid of a body? the centroid of a body does not depend on the orientation of the latter when a body has a plan of symmetry, the centroid must be located on this plane o when a body has two mutually perpendicular planes of symmetry, the centroid must be located on their line of intersection the centroid of a body is independent of its weight o none of the above

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?