The suspended 2.6 kg mass on the right is moving up, the 2.3 kg mass slides down the ramp, and the suspended 8.6 kg mass on the left is moving down. There is friction between the block and the ramp. The acceleration of gravity is 9.8 m/s 2 . The pulleys are massless and frictionless. What is the tension in the cord connected to the 8.6 kg block? Answer in units of N.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

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.