Author Question: A ball is thrown vertically upwards at 24.5 m/s. For its complete trip (up and back down to the ... (Read 28 times)

vicotolentino · **on:** Jul 28, 2018

A ball is thrown vertically upwards at 24.5 m/s. For its complete trip (up and back down to the starting position), its average speed is
a. 18.4 m/s.
b. 12.3 m/s.
c. 24.5 m/s.
d. 6.1 m/s.
e. not given.

Question 2

A parachutist jumps out of an airplane and accelerates with gravity to a maximum velocity of 68.6 m/s in 7.00 seconds. She then pulls the parachute cord and after a 4.00-second constant deceleration, descends at 10.5 m/s for 60.0 seconds, reaching the ground. From what height did the parachutist jump?
a. 1.03E+3 m
b. 7.88E+2 m
c. 1.19E+3 m
d. 1.66E+3 m
e. 1.43E+3 m