Hey all, I'm an idiot when it comes to algebra/physics/anything with numbers so you'll probably be seeing me around alot until the end of the semester, but I'll try to lend aid when I can(adsbygoogle = window.adsbygoogle || []).push({});

Anyway, this is what I've got:

1. The problem statement, all variables and given/known data

A 0.267 kg ball is thrown straight up from 2.33 m above the ground. Its initial vertical speed is 12.00 m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.

2. Relevant equations

Force due to gravity = m * g

Height of trajectory = V^2 / 2 * g

Force = mass * distance (No Cos(theta) here because it's a straight up and down trajectory, right?)

3. The attempt at a solution

So, I figured the force of gravity working on the ball:

F = mg = 2.62 N = .267 * 9.81

Trajectory height = V^2 / 2 * g = 7.74866 = 12.33^2/(2*9.81)

Then I added 2.33 to the (7.75*2) (that's the distance up and down) which ended up being 17.83

Then used Force = Mass * Distance to get 46.689 Joules for an answer and apparently it's wrong, and I have no clue what to do.

I'm sure there's just a hole in my logic somewhere. Thanks for any help.

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# Homework Help: Tossed ball - Work done

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