Manfra8 - Course Business: PHYS342 Lecture 8 Problem set 3:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Course Business: PHYS342 Lecture 8 Problem set 3: From Chapter 2 – problems: 26, 27, 31, 32, 37, 41, 44, 57, 58, 60 We will try to cover relativistic momentum and energy today. We will finish relativity next week. On next Friday the 4th we will have an in class practice exam on relativity. It will not count toward your grade – it is simply practice solving problems for the exam on February 11th.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Relativistic Momentum Before the collision, the momentum of Mary’s ball, as measured by Frank, becomes: Before Before For a perfectly elastic collision, the momentum after the collision is: After After The change in y -momentum of Mary’s ball according to Frank is: v K K x z y v Mx p m = 2 2 1 v / My p mu c = - v Mx p m = 2 2 1 v / My p mu c = - - 2 2 2 1 v / My p mu c = - - whose magnitude is different from that of his ball: pFy = 2 m u
Background image of page 2
The conservation of linear momentum requires the total change in momentum of the collision, Δ pF + Δ pM , to be zero. The addition of these y -momenta is clearly not zero. Linear momentum is not conserved if we use the conventions for momentum from classical physics—even if we use the velocity transformation equations from special relativity. There is no problem with the
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

Manfra8 - Course Business: PHYS342 Lecture 8 Problem set 3:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online