A 72.0 kg stuntman jumps from a moving car to a 2.50 kg skateboard at rest. If the velocity of the car is 15.0 m/s to the east when the stuntman jumps, what is the final velocity of the stuntman and the skateboard?
A 0.521 m/s to the east
B 14.5m/s to the east
C 15.5 m/s to the east
D 432 m/s to the eas

The final velocity of the skateboard is 14.5 m/s

Explanation:

Given:

Mass of the man, m₁ = 72 kg

Velocity of the car, v₁ = 15 m/s

Mass of the skateboard, m₂ = 2.5 kg

Velocity of the skateboard = 0 (at rest)

Final velocity, V = ?

When the stuntman jumps onto the skateboard, the momentum remains conserved.

Thus,

m₁v₁ + m₂ X v₂ = (m₁ + m₂) V

On substituting the value we get:

Thus, the final velocity of the skateboard is 14.5 m/s

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.

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.