A 23.0-g bullet strikes and becomes attached inside a 2.80-kg block of wood placed on a horizontal surface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.329, and the impact drives the block a distance of 12.6 m before it comes to rest, what was the muzzle speed of the bullet?

A car of mass 1,907 kg collides with a wall. The initial speed of the car is 18.2 m/s. After collision, the car bounced in the opposite direction at a speed of 2.9 m/s. If the collision lasted for 172 ms, what was the average force in newtons exerted on the car by the wall? Express your answer in two decimal places with units of Newton.

In the figure, block 1 of mass m, slides from rest along a frictionless ramp from height h = 2.5 m and then collides with stationary block 2, which has mass m2 = 4m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction Hy is 0.15 and comes to a stop in distance d within that region. What is the value of distance d if the collision is (a) elastic and (b) completely inelastic? Frictionless (a) Number i Unit m (b) Number i Unit m tv 80 DD F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 @ %23 24 & 2 4. 6 7 Q W R Y * CO # 3

In the figure, block 1 of mass m, slides from rest along a frictionless ramp from height h = 2.3 m and then collides with stationary block 2, which has mass m2 = 2m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction Pk is 0.55 and comes to a stop in distance d within that region. What is the value of distance d if the collision is (a) elastic and (b) completely inelastic? - Frictionless 12 (a) Number i Unit (b) Number Unit