p34_029 - t is U = Pt . We note that there are 86400...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
29. If the beam carries energy U away from the spaceship, then it also carries momentum p = U/c away. Since the total momentum of the spaceship and light is conserved, this is the magnitude of the momentum acquired by the spaceship. If P is the power of the laser, then the energy carried away in time
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: t is U = Pt . We note that there are 86400 seconds in a day. Thus, p = Pt/c and, if m is mass of the spaceship, its speed is v = p m = Pt mc = (10 10 3 W)(86400 s) (1 . 5 10 3 kg)(2 . 998 10 8 m / s) = 1 . 9 10 3 m / s ....
View Full Document

Ask a homework question - tutors are online