3 A rough plane is inclined to the horizontal at an angle a, where tan a...

 

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3 A rough plane is inclined to the horizontal at an angle a, where tan a = A brick P of mass m is placed on the plane. The coefficient of friction between P and the plane is . Brick P is in equilibrium and on the point of sliding down the plane. Brick P is modelled as a particle. Using the model, (a) find, in terms of m and g, the magnitude of the normal reaction of the plane on brick P, (2) 3 (b) show that == For parts (c) and (d), you are not required to do any further calculations. Brick P is now removed from the plane and a much heavier brick Q is placed on the plane. 3 The coefficient of friction between Q and the plane is also 4 (c) Explain briefly why brick Q will remain at rest on the plane. Brick Q is now projected with speed 0.5 m s down a line of greatest slope of the plane. Brick Q is modelled as a particle. Using the model, d) describe the motion of brick Q, giving a reason for your answer. (1) (2) 3 A rough plane is inclined to the horizontal at an angle a, where tan a = A brick P of mass m is placed on the plane. The coefficient of friction between P and the plane is . Brick P is in equilibrium and on the point of sliding down the plane. Brick P is modelled as a particle. Using the model, (a) find, in terms of m and g, the magnitude of the normal reaction of the plane on brick P, (2) 3 (b) show that == For parts (c) and (d), you are not required to do any further calculations. Brick P is now removed from the plane and a much heavier brick Q is placed on the plane. 3 The coefficient of friction between Q and the plane is also 4 (c) Explain briefly why brick Q will remain at rest on the plane. Brick Q is now projected with speed 0.5 m s down a line of greatest slope of the plane. Brick Q is modelled as a particle. Using the model, d) describe the motion of brick Q, giving a reason for your answer. (1) (2)

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a Find in terms of mand g the magnitude of the normal reaction of the plane on brick P cos q msmg Sm... View the full answer