Question

A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is________________.

Answer 1

Answer:

doubled

Explanation:

Step 1. Linear momentum (p) = mass X velocity = mv

p = mv -----equation 1

Step 2. if the mass is now twice and speed is same

p = (2*m)v -----equation 2

solving equation 1 and 2 together,

p = mv = 2mv

p = 2

Therefore, its momentum is doubled