Q1PhysicsUnit 4: Work, Energy and Power
A wire suspended vertically from one of its ends is stretched by attaching a weight of to the lower end. The weight stretches the wire by 1 mm. Then the energy stored in the wire is
Physics · JEE
Easy The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces MCQs for JEE
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Syllabus context
Part of Work, Energy and Power in JEE Main Physics.
- Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power
- The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces
- Motion in a vertical circle
- Elastic and inelastic collisions in one and two dimensions
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Q2PhysicsUnit 4: Work, Energy and Power
The potential energy of a system
increases if work is done:
Q3PhysicsUnit 4: Work, Energy and Power
A spring with spring constants K when compressed by , the potential energy stored is U.If it is further
compressed by then its final potential energy is
Q4PhysicsUnit 4: Work, Energy and Power
Two springs of force constants and are
stretched by same force. The ratio of their respective potential energies is
Q5PhysicsUnit 4: Work, Energy and Power
Assertion
Graph between potential energy of a spring versus the extension or compression of the spring is a straight
line
Reason
Potential energy of a stretched or
compressed spring is proportional to
square of extension or compression
Q6PhysicsUnit 4: Work, Energy and Power
Which quantity of a two particles system depend only on the separation between the two particles?
Q7PhysicsUnit 4: Work, Energy and Power
A spring is kept compressed by a toy car of mass On releasing the car it moves with a speed of So, the elastic potential energy of the spring is
Q8PhysicsUnit 4: Work, Energy and Power
A car of mass moving with a
speed on a smooth road and
colliding with a horizontally mounted
spring of spring constnat
The maximum compression
of the spring is
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