Question

Two balls undergo inelastic collision. The y-momentum after the collision is 98 kilogram meters/second, and the x-momentum after the collision is 100 kilogram meters/second. What is the magnitude of the resultant momentum after the collision?

Answer 1

p = √ [(px)^2 + (py)^2]
we know that px is 100 kg m/sec
and we know that py is 98 m/sec

So, to find out the momentum, you just need to insert the number into the equation 

p = √(v1^2 + v2^2) 
p = √(98^2 + 100^2) 
p = 140.01 
p = 1.4 x 10^2 k m/s

Answer 2

Answer:

D.  1.4 × 10^2 kilogram meters/second