In an experiment, the 1 kg cart collides with a 3 kg cart but doesn’t stick to it. Instead, the 3 kg cart gets knock forward by the 1 kg cart at 0.30m/s, which comes to rest after the collision.
If the positive direction is to the right, what was the initial velocity of the 1.0-kg cart?

Explanation:

Given that,

Mass of the cart,

Mass of the cart 2,            

Final speed of cart 2,

Final speed of cart 1 is 0 as it comes to rest.

Let us assume that the initial velocity of the cart 2 is 0. So using the conservation of linear momentum as :

So, the initial velocity of the 1.0-kg cart is 0.9 m/s.      

root word, prefixes, and suffixes

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank