A railroad tank car contains milk and rolls at a constant speed along a level track. The milk begins to leak out the bottom. The car then

a. Need more information about the rate of the leak.

b. maintains a constant speed.

c. speeds up.

d. slows down.

option C

Explanation:

The correct answer is option C

There is no external force acting in the system hence the momentum will be conserved.

As the milk is leaking out of the tank mass of the tanker is decreasing.

When the mass of the container will decrease to conservation the momentum speed of the container will have to be increased.

So, the car carrying milk will speed up.