The two vectors and in fig. 3-28 have equal magnitudes of 10.0 m and the angles are 30â° and 105â°. find the (a) x and (b) y components of their vector sum , (c) the magnitude of , and (d) the angle makes with the positive direction of the x axis.

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?