m1 help please Watch

snoopyx
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A bullet of mass 0.025kg is fired horizontally from a rifle mass 6kg. the bullet leaves the rifle with a speed of 500ms.
Find the initial speed of the recoil of the rifle (2.08) - I have done this already
- The rifle recoils a horizontal distance of 0.02m before coming to rest. Assumign that the horizontal force which brings it to rest is constant
find in kN the magnitude of the horizontal force

Many thanks!
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Deshi
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Wtf, what board is this!!??
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Jaziek
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V^2 = u^2 + 2 a s

F = M a
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Yacoby
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(Original post by snoopyx)
Find the initial speed of the recoil of the rifle (2.08) - I have done this already
- The rifle recoils a horizontal distance of 0.02m before coming to rest. Assumign that the horizontal force which brings it to rest is constant
find in kN the magnitude of the horizontal force

Many thanks!
Quite a lot of the time it I find it helps if you write down what you do (and don't) know as well as the relevant equations:

v = 2.08
u = 0
s = 0.02
m = 6

The main equation you (should) remember about force is F = ma. We don't know a, so:
a = ?

Remembering equations, we can find a using:
v^2 = u^2 + 2as

Once you have worked out the acceleration, you can work out the force using:
F = ma
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