A neutron in a reactor makes an elastic head on collision with the nucleus of an atom inicially at rest  assume: the mass of an atomic nucleus is about 11 the mass of the neutron. What fraction of the neutron's kinetic energy is transferred to the atomic nucleus ?

A truck with a mass of 1570 kg and moving with a speed of 17.5 m/s rear-ends a 652 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. (a) Calculate the initial momentum of the truck (in kg m/s). kg m/s (b) Calculate the final velocities (in m/s) for the truck and the car. Vf = m/s Vf = m/s (c) Calculate the total momentum (in kg m/s) of the truck AND the car after the collision. kg m/s (d) Did you expect the results that you got for Part (a) and (c)? O No, since kinetic energy may not be conserved. O Yes, since the collision is inelastic. O No, since there were no forces acting on either the car or the truck during the collision. O Yes, since momentum is conserved in a collision with no external forces acting on the colliding objects.

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Question 34

Quèstion 18 Car A of mass 5M collides with a smaller car of unknown mass on a slick road. Assuming the collision is perfectly inelastic, Car A was traveling at 40 m/s to the right, Car B 10 m/s to the left, and the wreckage at 21.25 m/s to the right, calculate the mass of Car B. lype your answer in in the form of a factor of M. (Ex: 0.5M, M, 2M, etc...) A Moving to another question will save this response. « Question 18 of 22 > » 7:53 DELL

20) A 17 kg child was going 3 m/s on skates when he collides with a 76 kg adult who was going -1.4 m/s. Both remain loose after the collision, which is elastic. How fast is the boy moving immediately after the crash?