# Thread: Need help with equations of motion

1. ## Need help with equations of motion

Assume that g = 10 ms-2
A particle of mass 3 kg is initially (t = 0) at height z(0) = 20 metres and has zero initial velocity.
Assuming zero drag
the height of the particle after 5 seconds = z(5) = ______?_____ metres

I'm sure it's fairly simple but the answers i keep getting are ridiculous

2. ## Re: Need help with equations of motion

Is that after its bounced several times ?

3. ## Re: Need help with equations of motion

No, but don't worry i figured it out

4. ## Re: Need help with equations of motion

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thanks for sharing.