7) A mass M, is released from rest on an incline that makes a 42 degree angl the horizontal. In 3 seconds the mass is observed to have gone a distance o What is the coefficient of kinetic friction between the mass and the surface incline? a) 0.8 b) 0.7 c)0.6 d) 0.5 e) 0.3

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!