Aperson pushes against the raft as he dives into the water. as he moves forward the raft moves backwards in the water. the action force is his feet against the raft. what is the reaction force?

The reaction force is that if the persons feet exerts a force on the raft, then the raft exerts an equal and opposite reaction force on the persons feet .

The reaction force is raft pushes back on the person.

Explanation:

From Newton's third law, for every action, there is an equal and opposite reaction.

In the given problem, a person pushes against the raft as he dives into the water. As he moves forward but the raft moves backwards in the water.

The action force is his feet against the raft. The reaction force is raft pushing back a person. It causes diver to go forward into the water.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.