Calculate the momentum of each of the following objects:

Question

a) a 0.50 kg ball thrown straight up with a velocity of 30 m/s.
b) a 2000 kg railway car moving south at 10 m/s.
c) an electron of mass, 9.1 x 10-31 kg moving at a velocity of 1 x 107 m/s.
d) the Earth of mass, 6.0 x 1024 kg, moving in its orbit with a velocity of 3.0 x 104 m/s.

Answer 1

momentum = mass * velocity

 

Just plug in the numbers and compute the answers.  The only trick is to be sure the mass and velocity are in the same system of units.  In this case, they are all SI units so just plug and compute!