A rifle bullet with mass of 12 g traveling with a speed of 400 m/s strikes a large wooden block which it penetrates to a depth of 15 cm. Determine the magnitude of the frictional force that acts on the bullet. You may assume that the frictional force is constant.

The three blocks in the diagram above are connected by light strings that pass over frictionless pulleys. The acceleration of the system is 2 m/s². Find the tensions in the strings and the coefficient of kinetic friction between the blocks and surfaces (assume that is the same for both blocks).

A motorcycle has a speed of 25.0 m/s as it passes over the crest of a hill whose radius of curvature is 126 m. The mass of the motorcycle and rider is 342 kg. Find the normal force acting on the cycle and the rider.

can you answer these at a grade 12 university level with full explanation