(adsbygoogle = window.adsbygoogle || []).push({}); Hey everyone, I'm really lost with my physics homework!

A ball of mass 250 g is dropped 5 m onto a spring

-how much KE wil the ball have when it hits the spring?

-how much work will be done as the spring is compressed?

-If the spring is 250 kN/m, calculate how far the spring will be compressed?

3. A ball of mass 100g is hit vertically upwards with a bat. The bat exerts a constant force of 15 N on the ball and is contact with it for a distance of 5cm.

-how much work does the bat do on the ball?

-how high will the ball go?

I've tried setting up equations, but I can't seem to get answers that are realistic. It's very possible that I'm not using the right formulae, so maybe I should start there?

(Here's my working thus far: I'm completely stuck on 1a, but for 1b I converted the grams to newtons so..

w=f*d

w=2.5*5

w=12.5 J (but i'm not sure)

again, c confuses me a lot

for 2a, I did

w=15*.05=.75 J, but I'm not sure where to go from there!)

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# Homework Help: Questions re. KE/Work

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