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In this lesson, we will learn how to solve problems on moving a particle on a rough horizontal plane by resolving the forces parallel and perpendicular to the plane.

Q1:

Using the information in the figure, calculate the coefficient of kinetic friction rounding the result to the nearest two decimal places given that the mass of the body is 28 kg and that the acceleration due to gravity π = 9 . 8 / m s 2 .β¨

Q2:

Using the information in the figure, calculate the coefficient of kinetic friction rounding the result to the nearest two decimal places given that the mass of the body is 36 kg and that the acceleration due to gravity π = 9 . 8 / m s 2 .β¨

Q3:

A body of 12 kg was placed on a rough horizontal plane. It was pulled by a force whose line of action made an angle of π upwards of the plane where s i n π = 3 5 . If the body, starting from rest, moved a distance of 804 cm in 4 seconds and the coefficient of friction was 3 4 , find the magnitude of the pulling force. Take the acceleration due to gravity π = 9 . 8 / m s 2 .

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