A-LevelMathematicsMechanicsOct/Nov 2025Paper 4 Q56 Marks
A block of mass 5 kg is being pulled straight down a line of greatest slope of a rough plane by a force of magnitude 20 N. The plane is inclined at an angle of 10° to the horizontal and the 20 N force acts at an angle of 35° above the line of greatest slope of the plane (see diagram). The coefficient of friction between the block and the plane is 0.4. The speed of the block when it passes a point O is 2 m s⁻¹. [Figure 5] Find the speed of the block when it has moved 3 m down the plane from O.
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