Ball #1 (mass m) rolls off a table of height h and ball #2 (mass 3 m) rolls off a table of height 3 h. The balls have the same initial speed and hit the floor at horizontal distances x1 and x2 from the base of the table, respectively. Which statement is true? a) x2 = 3 x1 b) x2 = x1 c) x2 = √ 3 x1 d) x2 = 9 x1

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.