- #1
I-Love-Maths2
- 18
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A catapult is pulled back 10cm with a force of 30N. How fast does the stone of mass 0.5kg got at maximum speed assuming no air resistance.
I have absolutely no idea how to do this...
But, I am assuming you use Ek=1/2mv^2, though I can't figure out how to apply it
To rearrange that:
V=sqrt[Ek/(1/2m)]
So, to make it clearer
- 10cm would be the displacement (s)
- 30N would be the force (F)
- 0.5kg would be the mass (m)
- 9.8m/s is the given unit for gravity in GCSE (g)
Other equations that might be useful:
- WD=Fs so WD=300J
- Ep=mgh
- W=mg
So from that we need an equation that uses WD and m
Can anybody help?
I have absolutely no idea how to do this...
But, I am assuming you use Ek=1/2mv^2, though I can't figure out how to apply it
To rearrange that:
V=sqrt[Ek/(1/2m)]
So, to make it clearer
- 10cm would be the displacement (s)
- 30N would be the force (F)
- 0.5kg would be the mass (m)
- 9.8m/s is the given unit for gravity in GCSE (g)
Other equations that might be useful:
- WD=Fs so WD=300J
- Ep=mgh
- W=mg
So from that we need an equation that uses WD and m
Can anybody help?
Last edited: