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(a) A tennis player, standing at P, serves a tennis ball from a height of 3 m to strike the court at Q. (b) A plane is inclined at an angle of 30° to the horizontal.
(2015)
a) Two particles P and Q, of mass 4 kg and 7 kg respectively, are lying 0.5 m apart on a smooth horizontal table. (b) A wedge of mass 11 kg is held on the ground with its base horizontal and smooth faces inclined at 30° and 45° respectively to the hor
(a) A small smooth sphere A, of mass 2m, moving with speed 9u m s–1, collides directly with a small smooth sphere B, of mass 5m, which is moving in the same direction with speed 2u m s –1. (b) Two identical smooth spheres, P and Q, collide.
(a) A loaded test-tube of total mass m floats in water and is in equilibrium when a length d is submerged, as shown. (b) A skier of mass m kg is skiing on a hillside when he reaches a small hump in the form of an arc AB of a circle centre O and radius 7
(a) A uniform beam AB of length 3 and weight W is free to turn in a vertical plane about a hinge at A. The beam is supported in a horizontal position by a string attached to the beam at D and to a point E which is at a height c vertically above A. (b
