I WILL NAME YOU BRAINIEST PLEASE HELP 5. Law of Conservation of Momentum states that momentum of the system
before the collision is equal to the momentum of the system after the collision
unless an external force acts on the system.
Consider two cars with mass of 1 kg each.
Before the collision: Car A is moving to left right (-10 m/s), Car B is moving to
the right (20 m/s). Be careful with the sign.
After the collision: Car A and Car B are stuck together.
What is the velocity of the two cars after they are stuck together?
A. 5 m/s to the left( v = -5 m/s)
B. O m/s
c. 5 m/s to the right (v = 5 m/s)
D. 10 m/s to the right (v = 10 m/s)

I’m pretty sure b because they crash and stop

Explanation:

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.