5/15/2015 07:00 PM 62.9/100 Gradebook Score Question 14 of 14 Map sapling leamin

Question

5/15/2015 07:00 PM 62.9/100 Gradebook Score Question 14 of 14 Map sapling leaming in a very busy off-campus eatery one chef sends a 221-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.79 m/s. Almost simultaneously, the other chef launches a 100 eggieburger-on-a-bun (with but hold the horseradish) along the same counter from right ead on at the given to left at 2:15 m/s. The two delicacies friction-free due to accumulated grease- and merge into a single, unbelievably savory serving. In what direction does the delectible dish move, if it moves at all? the counter is practically 100 80 Tothe left. O To the right O Doesn't move. 100 At what speed does it move? Enter a positive number 100 100 100 m/s

Explanation / Answer

Masses M = 221 g

            m = 325 g

Initial velocities U = 1.79 m/ s

                      u = -2.15 m/ s

From law of conservation of linear momentum , MU + mu = ( M + m) v

Since they combine each other after collision.

From this v = [ MU + m u ] / ( m + M)

                 = -0.5552 m / s

negative sign indicates that they move to the left direction after collision.

Speed = 0.5552 m/ s

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