A homogeneous cubical brick lies motion less on a rough inclined surface. The half of the brick which applies greater pressure on the plane is :
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Odd one out : plane mirror , rough tile , sand paper , surface of brick .

A uniform cone of half angle phi stands on a rough inclined plane. Show that as the inclination of the plane is increased the cone will slide down before it topples over if the coefficient of friction is less than 4 tan phi .

A block of mass 5 kg is at rest on a rough inclined surface. If angle of inclination of plane is 60^(@) , then force applied by it on block is

A block of mass 5 kg is at rest on a rough inclined surface. If angle of inclination of plane is 60^(@) , then force applied by it on block is

A rectangular box lies on a rough inclined surface The co-efficient of friction beteen the surface and the box is mu . Le the mass of the box ne m What is the force acting on the box down the plane if the angle of inclination of the plane is increased to alpha gt theta ? .

A rectangular box lies on a rough inclined surface at theta . The co-efficient of friction between the surface and the box is mu. Let the mass of the box is m. What is the force acting on the box down the plane, if the angle of inclination of the plane is increased to alpha>theta ?

A rectangular box lies on a rough inclined surface . The coefficient of friction between the surface and the box is mu . Let the mass of the box be m . (a) At what angle of inclination theta of the plane to the horizontal will the box just start to slide down the plane ? (b) What is the force acting on the box down the plane , if the angle of inclination of the plane is increased to alpha gt theta ? (c) What is the force needed to be applied upwards along the plane to make the box either remain stationary or just move up with uniform speed ? (d) What is the force needed to be applied upwards along the plane to make the box move up the plane with acceleration a ?

A rectangular box lies on a rough inclined surface. The coefficient of friction between the surface and the box is mu . Let the mass of the box be m. (a) At what angle of inclination 0 of the plane to the horizontal will the box just start to slide down the plane ? (b) What is the force acting on the box down the plane, if the angle of inclination of the plane is increased to a gt theta (c) What is the force needed to be applied upwards along the plane to make the box either remain stationary or just move up with uniform speed ? (d) What is the force needed to be applied upwards along the plane to make the box move up the plane with acceleration a ?