Please Solve my Physics Momentum Question?

Posted on 2014-12-04 07:24:00 in Physics by RILEY

In beta decay, a neutron at rest decays into a proton and an electron ejected in opposite directions. If the electron's speed is 7.25 x 106 m/s, what is the proton's speed? Give your answer in m/s.

A 60.0-kg ice skater moving at 1.85 m/s in the +x-direction collides elastically with an 87.5 kg skater initially at rest. Find the velocity of the 60.0-kg skater after the collision in m/s.

In the previous problem, what is the velocity of the 87.5-kg skater in m/s?

A proton (mass of 1.67 x 10-27 kg) is moving at 1.25 x 106 m/s directly toward a stationary helium nucleus (mass 6.64 x 10-27 kg). After a head-on elastic collision, what is the velocity of the proton in m/s?

In the previous problem, what is the velocity of the helium nucleus in m/s?

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