Find the average force exerted on the bullet
A 6.1 g bullet is accelerated in a rifle barrel 86 cm long to a speed of 408 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated.
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A cardinal (Richmondena cardinalis) of mass 4.00×10-2 and a baseball of mass 0.143 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
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If the coefficient of friction between the block and the floor is 0.40, what is the speed of the block just before collision?
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