- #1

Mayzu

- 7

- 0

## Homework Statement

A cricketer fields the ball in the outfield, some 80 meters from the wicket keeper. The fielder needs to return the ball to the wicket keeper as quickly as possible. He can throw the ball with a speed of 140 km/hr. The cricket ball has a mass of 0.0168kg

(e) The fielder decides to throw the ball straight back to the wicket keeper, 80 m away. At what angle to the horizontal must he project the ball so that the ball reaches the wicket keeper without hitting the ground?

This question is worth 8 marks, but I cannot figure out how to do it!

## Homework Equations

Vf=Vi+a(delta)t

## The Attempt at a Solution

http://imgur.com/OJEDalz

^here's my working out. I just can't get past the last step, and my graphics calculator can't either, making me think I'm doing it completely wrong.