Chapter 5 – Work, Energy and Power

A man of mass m , standing at the bottom of the staircase of height L climbs it and stands at its top . A man of mass m standing at the bottom of the staircase of height L climbs it and stands at its top . November 9, 2020 Category: Chapter 5 - Work, [...]

Which of the diagrams in figure correctly shows the change in kinetic energy of an iron sphere falling freely in a lake having sufficient depth to impact it a terminal velocity? Which of the diagrams in figure correctly shows the change in kinetic energy of an iron sphere falling freely in a lake having sufficient [...]

In a shotput event an athlete throws the shotput of mass 10 kg with an initial speed of 1m/s at 45^∘ from a height 1.5 m above ground. Assuming air resistance to be negligible and acceleration due to gravity to be 10m/s^2, the kinetic energy of the shotput when it just reaches the ground will [...]

A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen through a height (3/4)h. Which of the diagrams shown in figure correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground ? A raindrop falling from a height [...]

A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute its kinetic [...]

Which of the diagrams shown in figure. Most closely shows the variation in kinetic energy of the earth as it moves once around the sun in its elliptical orbit ? Which of the diagrams shown in figure. Most closely shows the variation in kinetic energy of the earth as it moves once around the sun [...]

A body is moving unidirectionally under the influence of a source of constant power supplying energy. Which of the diagrams shown in figure. Correctly shows the displacement-time curve for its motion ? one gradual and the other steep meet at A from where two stones are allowed to slide down from rest one on each [...]

A particle of mass 0.5kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force during its displacement from x=0 to x=2m? A particle of mass 0.5kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force [...]

Two identical ball bearings in contact with each other and resting on a frictionless table are hit heat-on by another ball bearing of the same mass moving initially with a speed V as shown in figure. If the collision is elastic, which of the following (figure) is a possible result after collision ? one gradual [...]

The potential energy function for a particle executing linear SHM is given by V(x)= 2/1 ​ kx^2 where k is the force constant of the oscillator. For k=0.5 Nm^−1, the graph of V(x) versus x is shown in the figure. A particle of total energy E turns back when it reaches x=±x m ​ . [...]