Work, Energy and Power questions
712 published questions with worked solutions.
- A car accelerates from rest at u m/s. The energy spent in this process is E J. The energy required to accelerate the car from u...
- The ratio of powers of two motors is 3 x x+1 , that are capable of raising 300 kg water in 5 minutes and 50 kg water in 2 minutes...
- A block of mass 10 kg is moving along x-axis under the action of force F = 5x N. The work done by the force in moving the block...
- A body of mass 1 kg begins to move under the action of a time dependent force F =(t i +3t^2 j )N where i and j are the unit...
- Identify the correct statements from the following: A. Work done by a man in lifting a bucket out of a well by means of rope tied...
- A 0.4 kg mass takes 8 s to reach ground when dropped from a certain height 'P' above surface of earth. The loss of potential...
- A body of mass 2 kg is initially at rest. It starts moving unidirectionally under the influence of a source of constant power P....
- A lift of mass M = 500 kg is descending with speed 2 ms^ -1 . Its supporting cable begins to slip thus allowing it to fall with a...
- A spring of force constant 800 N/m has an extension of 5 cm. The work done is extending it from 5 cm to 15 cm is
- A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total...
- A force F = (5 i + 3 j + 2 k)N is applied over a particle which displaces it from its origin to the point r = (2 i - j)m. The...
- A body of mass m, accelerates uniformly from rest to v_1 in time t_1. The instantaneous power delivered to the body as a function...
- A body of mass m is accelerated uniformly from rest to a speed v in a time T. The instantaneous power delivered to the body as a...
- A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. the work done by the force of gravity during the...
- A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m which applying the force...
- The potential energy of a 1 kg particle free move along the x-axis is given by V(x) = ( x^4 4 - x^2 2 )J The total mechanical...
- This question contains Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best...
- The potential energy function for the force between two atoms in a diatomic molecule is approximately given by U(x) = a x^ 12 - b...
- A weightless thread can bear tension upto 37 N. A stone of mass 500 g is tied to it and revolved in a circular path of radius 4 m...
- A particle suspended by a light inextensible thread of length l is projected horizontally from its lowest position with velocity...
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