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3. A box of mass 10 kg slides from rest 2.4 m down the inclined plane whose angle of inclination is 33". During its motion, the coefficient of kinetic friction between the block and the incline is 0.3. Using work - energy theorem, find the speed of the box after traveling the said distance. 4. 1. A cart of mass 0.64 kg that is moving to the left with a velocity of 3 m/s collides with a block of wood that is initially at rest. The mass of the block of wood is 0.36 kg. What is the velocity of each object after collision if the collision is elastic