Which ramp requires the least amount of force? A man pushes a ball on a ramp with an arrow after the ball pointing up the ramp. The ramp is labeled with length 2 feet and height 1 foot. A man pushes a ball on a ramp with an arrow after the ball pointing up the ramp. The ramp is labeled with length 3 feet and height 1 foot. A man pushes a ball on a ramp with an arrow after the ball pointing up the ramp. The ramp is labeled with length 4 feet and height 1 foot.

lol

explanation:

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

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.