My Notes Ask Yo eacher The six figures below show rubber balls before and after

Question

My Notes Ask Yo eacher The six figures below show rubber balls before and after they bounce off a floor. All the balls are identical, and their velocities before and after the bounce are shown. In case F, the velocity of the ball after bouncing is v = 4m/s. 2 mis 4-mls mis 3-m/s 4-mis Rank the balls, frorn largest to sallest based on the impulse delivered to the ball by the floor during the bounce. Ties are possible. Use the syrnbols and to Indicate your ranking, listing any that are ecqual In alphabetical order. For example, if Y and Z are the same and are both greater than X, then you would enter Y-Z(nate: Z-Y-X would be Incorrect since Y and Z, being equal, must be in alphabetical order). LARGEST IMPULSE SMALLEST IMPULSE Suppose the mass of ball F is 0.6-kg. What is the impulse delivered to the ball by the foo? N.s | direction?

Explanation / Answer

Impulse = change in momentum

For A = m(4-(-5)) = 9m

For B = m(2-(-4)) = 6m

For C = m(2-(-6)) = 8m

For D = m(1-(-5)) = 6m

For E = m(3-(-3)) = 6m

For F = m(4-(-4)) = 8m

So order is

A> F = C > B = E = D

Impulse delivered to the ball by the floor = 0.6×8 = 4.8 N.s upward

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