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You are doing an experiment in the classroom with a ramp and two balls of EQUAL mass. The balls are released at the same time and start rolling down the incline. (you are supposed to see that all is not perfect. we don’t expect the identical balls to travel down the ramp at the exact same time, only close. you should see that if the balls are close ‘within 1 or 2 cm’, we will call it identical.
Why do they NOT travel down the ramp exactly together?
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The two balls having equal mass are rolled down the inclined plane. If the balls were identical, they reach the bottom at equal time intervals. If balls are not identical but have equal masses, they will not arrive at the same time. At any time t, on the ramp, the forces acting on the balls are the weight and the normal force, and friction force. Applying Newton's second law of motion, the acceleration of the object can be calculated.
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