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A smooth tube of certain mass is rotated in a gravity-free Space and released. The two balls shown in Fig move towards the ends of the tube. For the whole system, which of the following quantities is not conserved.
27
Nov
A smooth tube of certain mass is rotated in a gravity-free Space and released. The two balls shown in Fig move towards the ends of the tube. For the whole system, which of the following quantities is not conserved. A smooth tube of certain mass is rotated in a gravity-free Space and released. The two [...]
A block of mass m is attached to a pulley disc of equal mass m, radius r by means of a slack string as shown. The pulley is hinged about its centre on a horizontal table and the block is projected with an initial velocity of 5m/s. Find the velocity when the string becomes taut.
27
Nov
A block of mass m is attached to a pulley disc of equal mass m, radius r by means of a slack string as shown. The pulley is hinged about its centre on a horizontal table and the block is projected with an initial velocity of 5m/s. Find the velocity when the string becomes taut. [...]
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A block of mass m is attached to a pulley disc of equal mass m ,
then the initial angular acceleration of the board is: (Neglect weight of board) ,
thereby destroying balance ,
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off ,
A rocket with a lift-off mass 20,000kg is blasted upwards with an initial acceleration of 5.0ms^−2 . Calculate the initial thrust (force) of the blast.
27
Nov
A rocket with a lift-off mass 20,000kg is blasted upwards with an initial acceleration of 5.0ms^−2 . Calculate the initial thrust (force) of the blast. 000kg is blasted upwards with an initial acceleration of 5.0ms^−2 . Calculate the initial thrust (force) of the blast. A rocket with a lift-off mass 20 November 27, 2020 Category: [...]
The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle? The mass of the three-wheeler is 400 kg and the mass of the driver is 65 kg.
27
Nov
The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle? The mass of the three-wheeler is 400 kg [...]
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(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
A small bead of mass m moving with velocity v gets threaded on a stationary semicircular ring of mass m and radius R kept on a horizontal table. The ring can freely rotate about its centre. The bead comes to rest relative to the ring. What will be the final angular velocity of the system?
27
Nov
A small bead of mass m moving with velocity v gets threaded on a stationary semicircular ring of mass m and radius R kept on a horizontal table. The ring can freely rotate about its centre. The bead comes to rest relative to the ring. What will be the final angular velocity of the system? [...]
Tags:
then the initial angular acceleration of the board is: (Neglect weight of board) ,
thereby destroying balance ,
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off ,
A sphere is rolling down an inclined plane without slipping. The ratio of rotational energy to total kinetic energy is
27
Nov
A sphere is rolling down an inclined plane without slipping. The ratio of rotational energy to total kinetic energy is A sphere is rolling down an inclined plane without slipping. The ratio of rotational energy to total kinetic energy is November 27, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 9 - [...]
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration of the body.
27
Nov
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration of the body. A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration [...]
A constant force acting on a body of mass 3.0 kg changes its speed from 2.0m s^−1 to 3.5m s^ −1 in 25s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?
27
Nov
A constant force acting on a body of mass 3.0 kg changes its speed from 2.0m s^−1 to 3.5m s^ −1 in 25s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force? (a) during its upward motion (b) during its downward motion (c) at the [...]
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(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
A small solid sphere of radius r rolls down an incline without slipping which ends into a vertical loop of radius R. Find the height above the base so that it just loops the loop
27
Nov
A small solid sphere of radius r rolls down an incline without slipping which ends into a vertical loop of radius R. Find the height above the base so that it just loops the loop A small solid sphere of radius r rolls down an incline without slipping which ends into a vertical loop of [...]
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ?
27
Nov
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ? A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. [...]