Aunt matilda goes to a well and throws a penny straight down the well at 3.0 m/s. she hears a splash after 0.5 seconds. how deep is the well? a) 0.31 m b ) 0.91 m c) 1.54 m d) 2.73 m e) 5.30 m

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?