Explain how work is done when a ball impacts with the ground.

answer:

Explanation:

depends on the floor, the ball, and the speed

answer: When the object falls to the ground, it gives up its energy in the form (largely) of heat. The energy released when it hits the ground should nicely balance the energy gained during the ride upward. Since force is absent during the fall, there's no work and no violation of any principal in physics. When it hits the floor it has no potential energy, but lots of kinetic energy. Another interesting thing happens when the ball hits the floor. Remember that the ball bounces back up to a height lower than it started, so after one bounce it has less potential energy than it started with.

The distance of the first bright fringe is given as  

The distance of the second dark fringe from the central bright fringe is given as  

Explanation:

From the question we are told that

     The slit separation distance is  

      The distance of the slit from the screen is  

        The wavelength is

For constructive interference to occur the distance between the two slit is mathematically represented as

 Where m is the order of the fringe which has a value of 1 for first bright fringe

    Substituting  values

For destructive  interference to occur the distance between the two slit is mathematically represented as

      m = 2

so the formula to get the dark fringe is

 Now substituting values