A 8.00 g bullet is fired horizontally into a 1.20 kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.20. The bullet remains embedded in the block, which is observed to slide 0.390 m along the surface before stopping. What was the initial speed of the bullet?

A basketball (m=0.625 kg) and a baseball (m=145g) are dropped from a height of 2.5 m.  For simplicity, assume the basketball and the baseball fall the full height and collide at ground level and that the coefficient of restitution between the floor and the basketball is 0.85.  (The coefficient of restitution represents the ratio between the velocity just before collision and the velocity just after collision, the up bounce.)  Determine the velocity of the baseball after its collision with the basketball.  Assume a perfectly elastic collision between the baseball and the basketball an upward=positive sign convention and g = 10 N/kg.

A 0.0210 kg bullet moving horizontally at 450 m/s embeds itself into an initially stationary 0.500 kg block. (a) What is their velocity (in m/s) just after the collision? m/s (b) The bullet-embedded block slides 8.0 m on a horizontal surface with a 0.30 kinetic coefficient of friction. Now what is its velocity (in m/s)? m/s (c) The bullet-embedded block now strikes and sticks to a stationary 2.00 kg block. How far (in m) does this combination travel before stopping? m

A 0.020 kg bullet is shot horizontally and collides with a 2.00 kg block of wood. The bullet embeds in the block and the block slides along a horizontal surface for 1.50 m. If the coefficient of kinetic friction between the block and the surface is 0.400, what was the original speed of the bullet? Include a diagram of the situation.

To test the impact resistance of a new material, a steel ball is shot through bricks of the material. Two bricks, each with a mass of 1.5 kg, are resting on a frictionless surface, a short distance apart from each other. A steel ball, with a mass of 0.118 kg, is shot into the first brick with a velocity of 174 m/s, and after passing through the first brick, it embeds itself in the second brick. The first brick has a velocity of 1.83 m/s right after the ball leaves. What is the velocity of the second brick with the embedded ball?

Two asteroids of equal mass collide in an ellastic collision. Asteroid A has an initial velocity of 40 m/s. After the collision, asteroid A deflects an an angle of 30° above its initial direction. Asteroid B is initially at rest. After the collision, asteroid B travels at 45° below the original direction of asteroid A. What are the final speeds of the two asteroids?

A 2.8 kg block of wood sits on a frictionless table. A 3.0 g bullet, fired horizontally at a speed of 510 m/s , goes completely through the block, emerging at a speed of 210 m/s . What is the speed of the block immediately after the bullet exits?

During a circus act, a performer thrills the crowd by catching a cannon ball shot at him. The cannon ball has a mass of m1 = 12.5 kg and the horizontal component of its velocity is v = 8.25 m/s when the performer, of mass m2 = 69 kg, catches it.If the performer is on nearly frictionless roller skates, enter an expression for his recoil speed, in terms of the masses and initial speed. What is his recoil speed, in meters per second?

A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 6.00 m/s in 0.814 s.   (a)What is the magnitude of the linear impulse experienced by a 76.0kg passenger in the car during the time the car accelerates?   (b)What is the magnitude of the average total force experienced by a 76.0kg passenger in the car during the time the car accelerates?

A 6.43 kg ball moving initially at 10.8 m/s hits a 6.14 kg ball at rest, in a linear elastic collision. What is the speed of the first ball after the collision? (the one initially moving)     What is the speed of the second ball after the collision? (the one initially at rest)