6. A 7.5 g bullet is stopped in a block of wood with a mass of 4.3 kg. The speed of the bullet-wood system immediately after the collision is 0.47 m/s. What was the original speed of the bullet?
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- 31. a. Starting from Newton's second law of motion, prove that impulse is equal to a change in momentum. b. A particle of mass m moves with a momentum of magnitude p. Show that the kinetic energy of the particle KE = i. =p²/2mA 100g ball traveling horizantally at 25 m/s strikes a wall and rebounds at 19 m/s. What is the magnitude of the impulse experienced by the ball during the rebound? A. 1.2 Ns B. 1.8 Ns C. 4.4 Ns D. 5.4 Ns E. 7.2 Ns
- A truck (m=5000 kg) initially moving at 5 m/s slams into the back of a car (m=1,000 kg) that is sitting at an intersection. The bumpers lock, and the two vehicles move off together. Which vehicle experiences the larger impulse during in the collision? A. The truck. B. The car. C. The impulses are the same. v-5 m/s 00-00-0 m=5,000 kg m=1,000 kg11. Each croquet ball in a set has a mass of 0.53kg. The green ball, traveling at 11.9 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the blue ball if the green ball continues moving after the collision at 2.5 m/s in the same direction.4. A 1590-kilogram truck moving with a speed of 23.0 m/s runs into the rear end of a 1090-kilogram stationary car. If the collision is completely inelastic, how much kinetic energy is lost in the collision? sf6 60 ssfot sf60
- A 1.30 kg mass (mass 1) moves to the right with a speed of 2.50 m/s and collides with a stationary 1.30 kg mass (mass 2). Assuming the collision is elastic, what are the velocities of the first and second masses following the collision? A. mass 1: 1.25 m/s to the right, mass 2: 1.25 m/s to the right mass B. mass 1: 0.00 m/s, mass 2: 2.50 m/s to the right C. mass 1: 1.25 m/s to the left, mass 2: 1.25 m/s to the right D. mass 1: 2.00 m/s to the right, mass 2: 0.50 m/s to the rightBall A, with a mass of 2.00 kilograms and an initial velocity of +4.00 meters per second, collides head-on with ball B, which has a mass of 3.00 kilograms and is initially at rest. If the collision is elastic, what are the velocities of the balls after the collision? Include units in your answers. Hint: Do not use a magical book equation! Consider what two quantities are conserved in this elastic collision. 4.0 4.0 S (ball A) (ball B)5. A 3000g crate of cakes travelling at 10ms^-1 collides with 15kg box of cans of diet coke travelling in the opposite direction at 5ms^-1 on a frictionless surface. The crates of cakes rebound at 4.5 ms^-1, at what velocity and what direction does the box of cans travel after the collision?