The figure shows six identical balls that are thrown off cliffs. All the cliffs

Question

The figure shows six identical balls that are thrown off cliffs. All the cliffs are the same distance above the ground, and the ground below each cliff is level. The figures show the initial velocity of each ball. Ignore air resistance. For each of the following ranking tasks use the symbols > and = to indicate your ranking (ties are possible), listing any that are equal in alphabetical order. For example, if Y and Z are the same and ate both greater than X. then you would enter Y=Z>X (note: Z=Y>X would be incorrect, since Y and Z, being equal, must be in alphabetical order). Rank the balls, from largest to smallest. based on their kmettc energy at the beginning (at the moment shown in the picture), largest KE smallest KE Rank the balls, from largest to smallest, based on their potential energy at the beginning (at the moment shown in the picture), largest PE smallest PE Rank the balls, from largest to smallest, based on their mechanical energy at the beginning (at the moment shown m the picture), largest ME smallest ME Finally, using your previous results, rank the balls. from largest to smallest, based on their speed just before they hit the ground fastest speed slowest speed

Explanation / Answer

a) C>E>F>B=D >A b) since the height of the balls are the same in the picture implies all their PE is the same imple A=B=C=D=E=F c) Mechanical energy = 0 for every ball since there is not constraint which is holding back the ball

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