Bill and Ted are wearing Velcro suits and are running towardseach other. Bill has a mass of 60 kg and is running to the rightat 4 m/s; Ted has a mass of 50 kg and is running to the left at4.8 m/s. When they collide, they stick together (because yaknow, Velcro). Calculate their velocity after colliding witheach other.

We know that in a collision the momentum is conserved, that is:

where the momentum is given by:

In this case the conservation of momentum can be express as:

where m1 and m2 are the masses of the boys, v1 and v2 are their initial velocities and u is the final velocity after the collision. In this case we know that:

Bill mass is 60 kg and the initial velocity is 4 m/s.

Ted mass is 50 kg and the initial velocity is -4.8 m/s (the minus sign comes from the fact that he runs to the left).

Plugging these values and solving for u we have:

Therefore, the velocity after they collide is zero. This means that after they collide, they stopped.

good looking response

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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