Answer to Question #285465 in Physics for haasggdfnsd

Question

Read the statements carefully and underline the word or group of words that makes the statement incorrect then change it to make it correct. 7. For perfectly elastic collisions, the total KE of the system remains the same before and after collision. 8. For inelastic collisions, the total KE before collision is not equal to the total KE after collision. 9. The coefficient of restitution is the ratio of the relative velocities of the bodies after collision to the relative velocities of the bodies before collision. 10. In a perfectly inelastic collision, the total energy before and after collision is the same, while in an inelastic collision, the total energy before collision is not the same as the total energy after collision. 11. Motion of particles can be predicted using the laws of conservation of momentum and laws of conservation of mechanical energy. 12. Impulse is the product of the mass and the velocity of an object. The change in momentum is Δp= mΔv.

Answer 1

7. For perfectly elastic collisions, the total KE of the system remains the same before and after collision. [Correct]

8. For inelastic collisions, the total KE before collision is not equal to the total KE after collision. [Correct]

9. The coefficient of restitution is the ratio of the relative velocities of the bodies after collision to the relative velocities of the bodies before collision. [Correct]

10. In a perfectly inelastic collision, the total energy before and after collision is the same, while [change to 'and'] in an inelastic collision, the total energy before collision is not [remove 'not'] the same as the total energy after collision.

11. Motion of particles can be predicted using the laws of conservation of momentum and laws of conservation of mechanical energy. [Correct]

12. Impulse is the product of the mass and the [change] in velocity of an object. The change in momentum is Δp= mΔv.