The collar of 5 kg mass shown in the figure moves on a parabolic bar on a horizontal plane. The collar has a speed of 8 m/sec when it is at point B. Determine the friction force between the collar and the bar if the coefficient of friction is 0.25. Formula of the parabolic bar is shown in the figure

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.