JEE Advanced Physics: Work Energy Power Practice Questions

14 questions with answers and step-by-step solutions. Tap any question to see the full worked solution.

Q1.
$A spring with spring constant 100 N/m is compressed by 0.1 m. What is the potential energy stored in the spring?$
Easy
Q2.
$A body of mass 5 kg is raised to a height of 10 m above the ground. What is the change in its gravitational potential energy?$
Easy
Q3.
$A car of mass 1000 kg is moving with a velocity of 20 m/s. What is its kinetic energy?$
Easy
Q4.
$A force of 10 N acts on a body of mass 2 kg for 5 seconds. If the body starts from rest, what is the work done by the force?$
Easy
Q5.
$A machine does 400 J of work in 20 seconds. What is the power delivered by the machine?$
Easy
Q6.
$A f or ce F = (3 x^{2} + 2 x) N a c t so na p a r t i c l e m o v in g a l o n g t h e x - a x i s . W ha t i s t h e w or k d o n e b y t hi s f or ce a s t h e p a r t i c l e m o v es f r o m x = 0 t o x = 2 m ?$
Medium
Q7.
$A p a r t i c l eo f ma ss mm o v es ina p o t e n t ia l f i e l d U (x) = a * x^{2} - b * x^{4}, w h er e aan d ba r e p os i t i v eco n s t an t s . W ha t i s t h e minim u m s p ee d r e q u i r e df or t h e p a r t i c l e$
Medium
Q8.
$A block of mass m is attached to a spring of spring constant k and is pulled from its equilibrium position by a distance x. If the block is released from rest,$
Medium
Q9.
$A particle moves under the influence of a force F = -k*r, where k is a constant and r is the position vector. What is the potential energy of the particle at a$
Medium
Q10.
$A chain of mass M and length L is held on a frictionless table with a portion of length L/n hanging over the edge. If the chain is released, what is the speed o$
Hard
Q11.
$A block of mass m is pushed against a spring of constant k by a distance x and released. The block slides along a frictionless surface and then up a circular tr$
Hard
Q12.
$A particle of mass m is attached to a light string of length L, which is fixed at one end. The particle is released from rest when the string is horizontal. At$
Hard
Q13.
$A p a r t i c l eo f ma ss mi s m o v in g ina p o t e n t ia l f i e l d U (x) = a x^{2} - b x^{4}, w h er e aan d ba r e p os i t i v eco n s t an t s . F or w ha t r an g eo f e n er g y E c an t h e p a r t i c l e u n d er g$
Hard
Q14.
$A particle moves in a force field given by F = -k(y i + x j) where k is a constant. If the particle moves from (0,0) to (a,b) along a path, what is the work don$
Hard

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