A0.080kg robin, perched on a power line 6 m above the ground , swoops down to snatch a worm from the ground and then returns to an 8 m high tree beach with his catch. by how much did the birds pe increase in his trip from the power line to the branch?

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?