For numbers 7 to 10, refer to the graph 30 60
I
A
Distance (km)
% % % 8
D
10
0
09.00
10:00
11.00
12.00
13.00
14:00
7. What is the speed of the object at A?
A. 30 km/hr
B. 15 km/hr
C 2.73 km/hr
DO km/hr

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?