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# M2 Question watch

1. Can someone please do M2 3C q8 from edexcel.
A bullet of mass 10g travelling at 400m/s horizontally hits a vertical wall and penetrates the wall to a depth of 40mm. Assuming the resistive force exerted by the wall to be constant find the magnitude of the force.
2. (Original post by geoffhig)
Can someone please do M2 3C q8 from edexcel.
A bullet of mass 10g travelling at 400m/s horizontally hits a vertical wall and penetrates the wall to a depth of 40mm. Assuming the resistive force exerted by the wall to be constant find the magnitude of the force.
Work done against force = loss of KE
=> Fx = 0.5mv^2
=> F(40x10^-3) = 0.5(10x10^-3)(400)^2
=> F = 800/0.04 = 20000N

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