Afreight train rolls along a track with considerable momentum. if it rolls at the same speed but has twice as much mass, its momentum

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

carla slowed down in the beginning of her trip, stopped, and then sped up

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