A bullet of mass 0.05kg has a speed 400ms^-1. What is its kinetic energy? If it hits a wall of which the average resistive force is 10000N, calculate the distance penetrated by the bullet
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9
mass of bullet 0.05
speed of bullet 400
formula
K.E =1÷2M×V^2
= 1÷2×0.05×(400)^2
= 4000
Answered by
7
kinetic energy is four thousand joules
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