1. 75-g projectile traveling at 600 m/s strikes and becomes embedded in the 50-kg block, which is initially stationary. Compute the energy lost during the impact. Express your answer as an absolute value and as a percentage n of the original system energy E. 75 g 600 m/s 50 kg

A 5.00 kg block moving with a velocity of 2.00 m/s on a flat horizontal surface enters a region where the coefficient of friction has increased. The kinetic energy of the block

A 2.0-kg pistol fires a 0.90-g bullet with a muzzle speed of 1000 m/s. The bullet then strikes a 10-kg wooden block resting on a horizontal frictionless surface. The block and the embedded bullet then slide across the surface a. What is the kinetic energy of the bullet as it travels toward the block? b. What is the speed of the "bullet + block" system immediately after the bullet is embedded in the block?

Harold the Hurler is a physics student who is renowned for his baseball pitching arm. In order to determine the amount of work he performs in throwing a baseball, Harold devises an experiment. He stands at the bottom of a deep pit and hurls a 0.147 kg0.147 kg baseball through an open third‑floor window in a nearby building. Harold's aim is so accurate that the ball then smoothly enters the tube of the Baseball Absorber that Harold invented and patented. In this device, the ball compresses a spring until it comes momentarily to rest, and this maximum amount of compression is recorded as 0.437 m.0.437 m. The spring's force constant is 813 N/m,813 N/m, and the position of the baseball's momentary rest is 7.73 m7.73 m above ground level. The point in the pit where the Hurler starts his pitch is 11.7 m11.7 m below ground level. How much work does Harold perform on the baseball? Take ?=9.80 m/s2.