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Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed VA and VB respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :
28
Aug
Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed VA and VB respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be : Two bodies of masres 1kg and 3kg have [...]
A steel wire 2 m long is suspended from the ceiling. When a mass is hung at its lower end, the incerase in length recorded is 1 cm. Determine the strain in the wire.
28
Aug
A steel wire 2 m long is suspended from the ceiling. When a mass is hung at its lower end, the incerase in length recorded is 1 cm. Determine the strain in the wire. A steel wire 2 m long is suspended from the ceiling. When a mass is hung at its lower end the [...]
A helicopter flies horizontally with constant velocity in a direction θ east of north between two points A and B, at distance d apart. Wind is blowing from south with constant speed u; the speed of helicopter relative to air is nu, where n > 1. Find the speed of the helicopter along AB. The helicopter returns from B to A with same speed nu relative to air in same wind. Find the total time for the journeys.
28
Aug
A helicopter flies horizontally with constant velocity in a direction θ east of north between two points A and B, at distance d apart. Wind is blowing from south with constant speed u; the speed of helicopter relative to air is nu, where n > 1. Find the speed of the helicopter along AB. The [...]
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A helicopter flies horizontally with constant velocity in a direction θ east of north between two points A and B ,
at distance d apart. Wind is blowing from south with constant speed u; the speed of helicopter relative to air is nu ,
where n > 1. Find the speed of the helicopter along AB. The helicopter returns from B to A with same speed nu relative to air in same wind. Find the total time for the journeys. ,
Two stones of masses m and 2 m are whirled in horizontal circles, the heavier one in a radius, r/2, and the lighter one in radius, r. The tangential speed of lighter stone is n times that of the value of heavier stone when they experience same centripetal forces. The value of n is:
28
Aug
Two stones of masses m and 2 m are whirled in horizontal circles, the heavier one in a radius, r/2, and the lighter one in radius, r. The tangential speed of lighter stone is n times that of the value of heavier stone when they experience same centripetal forces. The value of n is: and [...]
One end of a string of length l is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle ( directed towards the centre ) will be(T represents the tension in the strings)
28
Aug
One end of a string of length l is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle ( directed towards the centre ) will be(T represents the tension [...]
An aeroplane pilot wishes to fly due west A wind of 100 km h^-1 is blowing towards south. (a) If the speed of the plane (its speed in still air) is 300 km h^-1 in which direction should the pilot head ? (b) What is the speed of the plane with respect tom ground ? Illustrate with a vector diagram.
28
Aug
An aeroplane pilot wishes to fly due west A wind of 100 km h^-1 is blowing towards south. (a) If the speed of the plane (its speed in still air) is 300 km h^-1 in which direction should the pilot head ? (b) What is the speed of the plane with respect tom ground ? [...]
A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45, the speed of the car is
28
Aug
A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45, the speed of the car is A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45 the [...]
A steel wire 2m long is suspended from the ceiling. When a mass is hung its lower end, the increase in length recorded is 1cm. Determine the strain in the wire.
28
Aug
A steel wire 2m long is suspended from the ceiling. When a mass is hung its lower end, the increase in length recorded is 1cm. Determine the strain in the wire. A steel wire 2m long is suspended from the ceiling. When a mass is hung its lower end the increase in length recorded is [...]
During a rainy day, rain is falling vertically with a velocity 2m//s A boy at rest starts his motion with a constant acceleration of 2m//s^(2) along a straight road . Find the rate at which the angle of the axis of umbrella with vertical should be changed so that the rain always falls parallel to the axis of the umbrella.
28
Aug
During a rainy day, rain is falling vertically with a velocity 2m//s A boy at rest starts his motion with a constant acceleration of 2m//s^(2) along a straight road . Find the rate at which the angle of the axis of umbrella with vertical should be changed so that the rain always falls parallel to [...]
A car is negotiating a cruved road of radius R. The raod is banked at an angle tetha. The coefficient of friction between the tyres of the car and the road is Us . the maximum safe velocity on this road is
28
Aug
A car is negotiating a cruved road of radius R. The raod is banked at an angle tetha. The coefficient of friction between the tyres of the car and the road is Us . the maximum safe velocity on this road is Two bodies of masres 1kg and 3kg have position vectors i^+2j^ + k^ [...]