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A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun?
27
Nov
A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun? A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the [...]
Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed 6ms^−1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other ?
27
Nov
Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed 6ms^−1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other ? Two billiard balls each of mass 0 .05 kg moving in opposite directions with speed 6ms^−1 collide and rebound [...]
A nucleus is at rest in the laboratory frame of reference Show that if it disintegrates into two smaller nuclei the products must be emitted in opposite directions .
27
Nov
A nucleus is at rest in the laboratory frame of reference Show that if it disintegrates into two smaller nuclei the products must be emitted in opposite directions . A nucleus is at rest in the laboratory frame of reference Show that if it disintegrates into two smaller nuclei the products must be emitted in [...]
Two masses 8 kg and 12 kg are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released.
27
Nov
Two masses 8 kg and 12 kg are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released. and the tension in the string when the masses are released. Two masses 8 [...]
Four identical rods each of mass m and length l are joined to form a rigid square frame. The frame lies in the xy plane, with its centre at the origin and the sides parallel to the x and y axes. Its moment of inertial about
27
Nov
Four identical rods each of mass m and length l are joined to form a rigid square frame. The frame lies in the xy plane, with its centre at the origin and the sides parallel to the x and y axes. Its moment of inertial about
Two identical cylindrical vessels, with their bases at the same level, each contain a liquid of density ρ. The height of liquid in one vessel in h 1 and that in the other is h2. The area of either base is A. What is the work done by gravity in equalizing the levels when the vessels are interconnected?
27
Nov
Two identical cylindrical vessels, with their bases at the same level, each contain a liquid of density ρ. The height of liquid in one vessel in h 1 and that in the other is h2. The area of either base is A. What is the work done by gravity in equalizing the levels when the [...]
Consider the situation as shown in the diagram , the ball strikes the wall normally and the collision is elastic , the change in the kinetic energy of the ball is
27
Nov
Consider the situation as shown in the diagram , the ball strikes the wall normally and the collision is elastic , the change in the kinetic energy of the ball is Consider the situation as shown in the diagram the ball strikes the wall normally and the collision is elastic the change in the kinetic [...]
Two balls are thrown simultaneously from top of tower in air as shown in the figure. (i) The acceleration of the center of mass of two balls while in air is equal to g. (ii) The path followed by the center of mass is parabola. (iii) The path followed by the center of mass will be vertical line if u1 sin alpha = u2 sin beta. (iv) The acceleration of the centre of mass will change if one ball after striking the ground comes to rest.
27
Nov
Two balls are thrown simultaneously from top of tower in air as shown in the figure. (i) The acceleration of the center of mass of two balls while in air is equal to g. (ii) The path followed by the center of mass is parabola. (iii) The path followed by the center of mass will [...]
A solid cylinder of mass 3kg is placed on a rough inclined plane of inclination 30^∘. If g=10ms^2, then the minimum frictional force required for it to roll without slipping down the plane is
27
Nov
A solid cylinder of mass 3kg is placed on a rough inclined plane of inclination 30^∘. If g=10ms^2, then the minimum frictional force required for it to roll without slipping down the plane is A solid cylinder of mass 3kg is placed on a rough inclined plane of inclination 30^∘. If g=10ms^2 then the minimum [...]
A boy stands over the centre of a horizontal platform which is rotating freely with a speed of 2 revolutions/s about a vertical axis through the centre of the platform and straight up through the boy. He holds 2kg masses in each of his hands close to his body. The combined moment of inertia of the system is 1kgm^2 . The boy now stretches his arms so as to hold the masses far from his body. In this situation, the moment of inertia of the system increases to 2kgm^2 . The kinetic energy of the system in the latter case as compared with that in the previous case will
27
Nov
A boy stands over the centre of a horizontal platform which is rotating freely with a speed of 2 revolutions/s about a vertical axis through the centre of the platform and straight up through the boy. He holds 2kg masses in each of his hands close to his body. The combined moment of inertia of [...]