Question 4 HELP ASAP PLEAS! With what initial speed must a gazelle jump to reach 2.5 meters in height?
a
7 m/s
b
25 m/s
с
49 m/s
d
5 m/s
Question 5
1. What is the potential energy of a 20 kg object, it is 10 m high from the

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)