- #1

Masrat_A

Number 4, I have no idea where to even begin. I've spent nearly an hour brainstorming, but have gotten nowhere. I do have class notes, but I'm unable to make sense of any of it. May I please have some direction on how I could go about solving? Are there any formulas I should be looking into?

1. Homework Statement

1. Homework Statement

3) A projectile is fired from ground at 37 degrees above horizontal at speed 50 m/s.

a) Determine the position of the highest point and the time it takes to reach it.

b) Determine the position and time at which it strikes a wall 200 m away.

4) (See figure.) A lemming accelerates uniformly starting from rest 2 m before jumping horizontally from the top of a 20 m high cliff. What is the minimum acceleration required so that the lemming can clear the rocks stretching out 4 m from the base of the cliff?

## Homework Equations

Figure for question 4: http://i.imgur.com/SMspyLdh.jpg

## The Attempt at a Solution

http://i.imgur.com/MpjwWeih.jpg