Let’s say i am in a bumper car and have a velocity of 14 m/s, driving in the positive x-direction. i and my bumped car have a mass of 120 kg. you are in a bumper car, sitting still. i run into you, and we collide elastically. i end up with a velocity of 2 m/s going in the negative x-direction. what is your mass, and what is your final velocity?

160 kg

12 m/s

Explanation:

= Mass of first car = 120 kg

= Mass of second car

= Initial Velocity of first car = 14 m/s

= Initial Velocity of second car = 0 m/s

= Final Velocity of first car = -2 m/s

= Final Velocity of second car

For perfectly elastic collision

Applying in the next equation

Mass of second car = 160 kg

Velocity of second car = 12 m/s

car a and b are moving in opposite directions

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the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force