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A neutron with mass $m$ makes a head-on, elastic collision with a nucleus of mass $M$ . which is initially at rest. (a) Show that if the neutron's initial kinetic energy is $K_{\infty}$ the kinetic energy that it loses during the collision is 4$m M K_{0} /(M+m)^{2} .$ (b) For what value of $M$ does the incident neutron lose the most energy? (c) When $M$ has the value calculated in part (b), what is the speed ofthe neutron after the collision?

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(a) $\frac{4 K_{0} m M}{(M+m)^{2}}$(b) $M=m$(c) $v_{A 2}=0$

Physics 101 Mechanics

Chapter 8

Momentum, Impulse, and Collisions

Moment, Impulse, and Collisions

Rutgers, The State University of New Jersey

University of Washington

Hope College

University of Winnipeg

Lectures

04:30

In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. In the case of a constant force, the resulting change in momentum is equal to the force itself, and the impulse is the change in momentum divided by the time during which the force acts. Impulse applied to an object produces an equivalent force to that of the object's mass multiplied by its velocity. In an inertial reference frame, an object that has no net force on it will continue at a constant velocity forever. In classical mechanics, the change in an object's motion, due to a force applied, is called its acceleration. The SI unit of measure for impulse is the newton second.

03:30

In physics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Given a force, F, applied for a time, t, the resulting change in momentum, p, is equal to the impulse, I. Impulse applied to a mass, m, is also equal to the change in the object's kinetic energy, T, as a result of the force acting on it.

12:19

A neutron with mass $m$ ma…

01:19

A neutron of mass $m$ and …

06:02

1.A neutron with mass m an…

11:54

(a) A neutron of mass $m_{…

02:52

A neutron makes an elastic…

04:16

03:26

A neutron travelling with …

01:56

When a neutron collides he…

05:58

A neutron in a nuclear rea…

07:41

A neutron in a reactor mak…

03:51

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