Recently Active Physics Questions

The disc of radius R is confined to roll without slipping at A and B .If the plates have velocitites as shown,determine angular velocity of disc..... Ans=3v/2R *Image* ...

*Image* A point object is moving with a speed v before an arrangement of two mirrors as shown in figure.Find the velocity of image in mirrorM ...

A uniform rod of mass m and length l rests on a smooth horizontal surface.One of the ends of the rod is struck in horizontal direction at right angles to the rod.As a result the rod attains a velocity v.Find the force with wh ...

two forces F1 and F2 are applied on spool of mass M and moment of inertia I about an axis passing from centre of mass.Find the ratio F1/F2 so that force of friction is zero. Given I<Mr2 *Image* ...

*Image* A ball is thrown towards a floor with speed u. The coefficient of restitution between floor and ball is "e".The speed with which ball rebounds is . ...

A cast iron column has internal diameter of 200mm .What should be the minimum external diameter so that it may carry a load of 1.6 MN without the stress exceeding 90N/m^2 ???? ...

The conducting concentric hollow spheres A and B have radii a and b respectively with A inside B.Their common potential is V . A is now given some charge such that potential becomes zero.The potential of B is __________ ...

A ring of radius R rolls on horz. ground with linear speed v and angular speed omega.For what value of theta the velociy of pt. P is in vertical direction (v<omega(R)) *Image* ...

sixteen balls of equal mass are strung like beads on a string, some are placed on a smooth inclined plane of inclinaton sin inverse (1/3) and the rest hang over the top of the plane. how the balls have been arranged if the ac ...

A solid sphere of mass m rolls down a incline plane of height h.Find KErot of sphere. ...

Show that If a rod is held at an angle θ to the horizontal and released, its lower end will not slip if friction b/w rod and ground is greater than (3sinθcosθ)/(1+3sin2θ). (...DC Pandey) ...

a whel consists of a circular disc of radius 'a' with four circular holes, each of radius a/4. the centres of the holes form a square and each centre is at a distance a/2 from the centre of the disc. if m is the mass ...

A pitot tube is fixed in a main of diameter 15cm and the difference in pressure indicated by gauge is 4cm of water column. find the volume of water passing through the main in one minute !!!!!!! ...

There is a linear current density K= 2a A/m in z direction , on the X=0 plane, what is the field due to this current in two regions X>0 and X< 0 ? ...

3.24 A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m s–1. How much time does the ball take to return to his hands? If the lift starts movi ...

3.28 The velocity-time graph of a particle in one-dimensional motion is shown in Fig. 3.29 : *Image* Which of the following formulae are correct for describing the motion of the particle over the time-interval t1to t2: (a) x( ...

A small block of mass m is kept on a rough inclined surface of inclination θ fixed in an elevator. The elevator goes up with the uniform velocity v and the block does not slide on the wedge. The work done by the force of fri ...

a ball is dropped from a height. if it takes 0.200s to cross the last 6.00m before hitting the ground , find the height from which it was dropped ..(take g=10) ...

A chain of length l and mass m lies on the surface of smooth sphere of radius r > l with one end tied to the top of the sphere.(a) Find the gravitational potential energy of the chain with reference level at the centre of ...

Two masses m2 and m3 are connected by a spring of spring constant k and are placed on a frictionless horizontal surface. Initially the spring is stretched through a distance x when the system is released from rest. Find the d ...

Consider two observers moving with respect to each other at a speed v along a straight line. They observe block of mass m moving at a distance l on a rough surface. which of the following quantities will be same as observed b ...

*Image* find time period of mass 'm'... in 3 minutes... ...

irodov q no 3.133 page no 123 ...

A SMOOTH SPHERE of radius R is made to translate in a straight line with the constant accl. a . A particle kept on the top of sphere is released from there at o velocity with respect to the sphere . Find the speed of the part ...

*Image* calculate d current thru d diode .... source voltage is 9V and source resitance is 1kohms ...

*Image* P and Q are two coaxial conducting loops separated by some distance. Wen te switch S is closed, a clockwise curent i1 flows in P and an indused current I1 flows in Q. The switch remains closed for a long time. Wen S i ...

Ohm's law states that the current in a wire is directly proportional to the potential difference across it's ends, right? So why do we write V prop'l to I when the law states I prop'l to V ? ...

The system is released from rest from the position show in thediagram If A and B have mass m and M respectively and all surfaces are smooth , then the normal reaction between A and B is assume that string and pulley are massl ...

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A block of mass m is kept on a rough horizontal floor having coefficient of friction μ A constant horizontal force F is applied on the block towards right due to which it is moving with a constant acceleration a.Free body di ...