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**[SOLVED] Projectile motion**

**1. Homework Statement**

How do you calculate the projectile motion of an object in the following question?

John is a long jumper. He runs down a track, and jumps as far as he can horizonally. Her take-off velocity is 6.4 m s-1 at 20 degrees from the horizontal.

a) show that the horizontal component of her initial velocity is 6.0m s-1

b) Show that the vertical component of her initial velocity is 2.2 m s-1

c) Explain why the horizontal component of her velocity is constant.

**3. The Attempt at a Solution**

I know that for a) you use vectors to solve it but I don't know what to do after that and for the others I have no idea what to do so any help is appreciated

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**