Ball dropped from heigh and bounces to height, change in momentum?

[IDKPhysics101]

A bouncy ball of mass 85.3 grams is dropped from a height of 13.17 meters. It rebound to a height of 5.12 meters. What was the change in momentum (in kgm/s) of the bouncy ball?

 

[rock.freak667]

A bouncy ball of mass 85.3 grams is dropped from a height of 13.17 meters. It rebound to a height of 5.12 meters. What was the change in momentum (in kgm/s) of the bouncy ball?

What attempt did you try?

How would you find the speed of the ball at the point where it hits the ground?

(Hint: Think of conservation of energy)

 

[IDKPhysics101]

i was thinking one of the kinematic equations but not sure how to find initial and final velocity or what to set each one to to find the other

 

[rock.freak667]

i was thinking one of the kinematic equations but not sure how to find initial and final velocity or what to set each one to to find the other

Well take from the start to when it hits the ground, using a kinematic equation relating height and velocity, what is the velocity as it hits the ground?

 

[IDKPhysics101]

V^2=Vo^2+2a(X-Xo)?

would 13.17 be Xo and 5.12 be X?

would the Vo be 0?

would the velocity when it hits the ground be 1.34m/s?