An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. If the two objects stick together, what is the speed of the combined object, of mass 4m, after the collision? a. 2v
b. v/2
c. 0

Therefore, the correct option is c: 0.

Explanation:

We can find the speed of the combined object by conservation of linear momentum:

Where:

"i" is for initial and "f" is for final

m₁: is the mass of the first object = m

m₂: is the mass of the second object = 3m

v₁: is the velocity of the first object

v₂: is the velocity of the second object

Therefore, the correct option is c: 0.

I hope it helps you!                          

because growing process had stoped after 4-5 year

at right angles to each other