Calculate the magnitude of the linear momentum for thefollowing cases:

a) a proton with mass 1.67 x 10

^{-27}kg, moving with a speed of 5.00 x10^{6}m/sb) a 15.0-g bullet moving with a speed of 300 m/s

c) a 75.0-kg sprinter running with a speed of 10.0 m/s

d) Earth (mass = 5.98 x 10

^{24}kg) moving with anorbital speed equal to 2.98 x 10^{4}m/s.
## Answers ( 2 )

Use p=mv, where p= momentum, m=mass and v= velocity.

^{-27}kg, moving with a speed of 5.00 x10^{6}m/s^{-27 *}5.00 x10^{6}=8.35*10^{-21}kg m/s^{-3}*300 = 4.5 kg m/s^{24}kg) moving with anorbital speed equal to 2.98 x 10^{4}m/s.^{24}*2.98 x 10^{4}=1.78*10^{29}kg m/s