Physics

A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest [...]

A body of mass 1 kg begins to move under the action of a time dependent force F = (2t i^ – 3t^2j^​) N, where i^ and j^​ are unit vectors along x and y axis. What power will be developed by the force at the time (t)? A body of mass 1 kg begins [...]

The potential energy of a system increases, if work is done if work is done The potential energy of a system increases August 28, 2020 Category: Chapter 7 - Work, Energy and Power , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,

The potential energy of a particle in a force field is: U =A/r^2 ​− B/r​ where A and B are positive constants and r is the distance of particle from the centre of field. For stable equilibrium, the distance of the particle is : the distance of the particle is : The potential energy of [...]

A body of mass m is taken from earth’s surface to the height equal to twice the radius of earth, the change in potential energy of body will be A body of mass m is taken from earth's surface to the height equal to twice the radius of earth the change in potential energy of [...]

A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The velocity of the shell is A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The [...]

A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is [...]

Which one of the following statements is incorrect ? Which one of the following statements is incorrect ? August 28, 2020 Category: Chapter 6 - Friction , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,

‘A’ block ‘B’ is pushed momentarily along a horizontal surface with an initial velocity ‘υ’. If ‘μ’ is the coefficient of friction between ‘B’ and the surface, block ‘B’ will come to rest after a time 'A' block 'B' is pushed momentarily along a horizontal surface with an initial velocity 'υ'. If 'μ' is the [...]

A block of mass m is in contact with the cart as shown in figure. The coefficient of static friction between the block and the cart is . The acceleration of the cart that will prevent the block from falling satisfies A plank with a box on it at one end is gradually raised about [...]