- #1

creative_wind

- 7

- 0

I am (obviously) new to the forum. I am in an introductory-level physics course in university and although I had taken a year of physics in high school, these easy intro questions on my homework keep snagging me. This is online homework and I get 5 attempts at the correct solutions. This is what I have:

## Homework Statement

To make a bounce pass, a player throws a 0.60 kg basketball toward the floor. The ball hits the floor with a speed of 6.5 m/s at an angle of 64° from the vertical. If the ball rebounds with the same speed and angle, what was the impulse delivered to it by the floor?

## Homework Equations

I=Favg(T2-T1)=P=m*v

Where P=momentum

## The Attempt at a Solution

I=m*v

m=0.6kg

v=6.5*cos(64)=2.85m/s

I=0.6kg*2.85m/s=1.71kg*m/s <--this was wrong

I=m*v

m=0.6*cos(64)=0.26kg

v=6.5*cos(64)=2.85m/s

I=0.26kg*2.85m/s=0.74kg*m/s <--this was wrong

I figured the velocity had to be in the y-component since it is vertically upward from the floor. I'm really not sure though...

Thanks :)