Question

a 50 kg astronautejects 100 g of gas from his propulsion pistol at a velocity of 50 m/s. what is his resulting velocity?

Answer 1

m1v1 = m2v2
.1 (50) = 50(vf)

Answer 2

-0.50m/s

Answer 3

m1v1=m2v2
*convert 100g of gas to kg
(.1kg)(50m/s)=(50kg)(V2)

V2={(.1kg)(50m/s)}/50}
V2= -.10 m/s
*the resulting velocity becomes negative because this is an example of a free-fall problem
*objects direction becomes opposite