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A block of mass 1.2 kilogram slides down an inclined surface of length 1.0 meter. The inclined surface makes an angle of 30o with the horizontal. Its initial velocity is1.0 m/s. When it reaches the bottom it has a velocity of 2.0m/s.
a) Evaluate the initial mechanical energy of the block?
b) Find the work done by the force of kinetic friction?
c) Find the force and the coefficient of kinetic friction?
A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. (a) How much energy was lost in the collision? (b) Calculate the average force exerted on ..
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