Chapter 6 – Work, Energy and Power

The kinetic energy (KE) versus time graph for a particle moving along a straight line is as shown in the figure. The force versus time graph for the particle may be The kinetic energy (KE) versus time graph for a particle moving along a straight line is as shown in the figure. The force versus [...]

A spring and block are placed on a fixed smooth wedge as shown. Following conclusions can be drawn for the block. (i) magnitude of its momentum will be maximum when F net on block is zero (ii) its kinetic energy will be maximum when F net on block is zero (iii) kinetic energy of block [...]

Suppose y represents the work done and x the power, then dimensions of d^2y/dx^2 will be Suppose y represents the work done and x the power then dimensions of d^2y/dx^2 will be October 19, 2020 Category: Arihant Physics by D.C Pandey , Chapter 6 - Work, Energy and Power , Volume 2 ,

A block is released from the top of a smooth inclined plane of inclination θ as shown in figure. Let υ be the speed of the particle after travelling a distance s down the plane. Then which of the following will remain constant ? F=2x^2−3x−2 . Choose correct option. October 19, 2020 Category: Arihant Physics [...]

A particle of mass 0.5kg is displaced from position r→1(2,3,1) to r→2(4,3,2) by applying a force of magnitude 30N which is acting along (iˆ+jˆ+kˆ). The work done by the force is 1) to r→2(4 2) by applying a force of magnitude 30N which is acting along (iˆ+jˆ+kˆ). The work done by the force is 3% [...]

An object of mass m is allowed to fall from rest along a rough inclined plane. The speed of the object on reaching the bottom of the plane is proportional to: An object of mass m is allowed to fall from rest along a rough inclined plane. The speed of the object on reaching the [...]

A block of mass m is pulled by a constant power P placed on a rough horizontal plane. The friction coefficient between the block and surface is μ. Find the maximum velocity of the block. A block of mass m is pulled by a constant power P placed on a rough horizontal plane. The friction [...]

The force required to stretch a spring varies with the distance a shown in the figure. If the experiment is performed with the above spring of half length, the line OA will The force required to stretch a spring varies with the distance a shown in the figure. If the experiment is performed with the [...]

The displacement of a body of mass 2kg veries with time t as S=t^2+2t, where S is in seconds. The work done by all the forces acting on the body during the time interval t=2s to t=4s is The displacement of a body of mass 2kg veries with time t as S=t^2+2t where S is [...]

A 15gm ball is shot from a spring whose spring has a force constant of 600N/m. The spring is compressed by 5cm. The greater possible horizontal range of the ball for this compression is A 15gm ball is shot from a spring whose spring has a force constant of 600N/m. The spring is compressed by [...]