# A Skateboarder and an Observer#

Abbas is on a skateboard and has an initial velocity of (1.23 $$m/s$$) $$\hat{\imath}$$ relative to Emilia who is at rest with respect to the earth. Just as they are gliding past Emilia, Abbas throws a ball in the positive $$x$$-direction from a height of 1.83 m. According to Abbas, the ball has an initial velocity of (3.75 $$m/s$$) $$\hat{\imath}$$.

## Part 1#

What is the initial velocity of the ball according to Emilia?

Please enter in a numeric value in $$m/s$$.

## Part 2#

How long is the ball in the air?

Please enter in a numeric value in $$s$$.

## Part 3#

Relative to Emilia, where does the ball land?

Please enter in a numeric value in $$m$$.

## Part 4#

If the mass of Abbas plus the skateboard is 120.0 $$kg$$ and the ball has a mass of 1.17 $$kg$$, what is Abbas’s speed, as measured by Emilia, immediately after releasing the ball?

Please enter in a numeric value in $$m/s$$.

## Part 5#

Relative to Abbas, where does the ball land?

Please enter in a numeric value in $$m$$.