Q1PhysicsUnit 5: Rotational Motion
The moment of inertia of a flywheel is which is initially stationary. constant external torque acts on the wheel. The work done by this torque
during 10 sec is:
Physics · JEE
Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotational motions Short Tricks for JEE
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Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotational motions focus drill
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Dimensional check first
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Limiting cases
Substitute extreme values (t→0, m→∞, θ→0) to sanity-check your final expression.
Syllabus context
Part of Rotational Motion in JEE Main Physics.
- Centre of mass of a two-particle system, centre of mass of a rigid body
- Basic concepts of rotational motion, moment of a force, torque, angular momentum, conservation of angular momentum and its applications
- The moment of inertia, the radius of gyration, values of moments of inertia for simple geometrical objects
- Parallel and perpendicular axes theorems and their applications
- Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotational motions
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Q2PhysicsUnit 5: Rotational Motion
The vertical forces that the ground
exerts on a stationary van are shown.
The van is long with the wheels
at a distance of from the front
of the van and from the rear of
the van.
What is the horizontal distance of the
van's centre of gravity from the front of the van?
Q3PhysicsUnit 5: Rotational Motion
Assertion (A) : A wheel may be rotated
with uniform angular velocity even though the tangential forces are applied
on it.
Reason (R) : Angular acceleration of wheel is zero when tangential force and frictional force produce torques equal in magnitude and opposite in direction
Q4PhysicsUnit 5: Rotational Motion
A solid sphere rolls without slipping on
a rough horizontal floor, moving with a
speed It makes an elastic collision
with a smooth vertical wall. After
impact,
This question has multiple correct options
Q5PhysicsUnit 5: Rotational Motion
In a physical balance working on the principle of moments, when weight is placed on the left plan, the beam becomes horizontal. Both the
empty pans of the balance are of equal mass. Which of the following statements is correct?
Q6PhysicsUnit 5: Rotational Motion
Three similar spheres of mass and
radius r are moving down along three
inclined planes and of similar
dimensions. Sphere on inclined plane rolls down in pure rolling, on B it partially
rolls and partially slides down the plane
whereas on plane it slides down
without rolling, then at the bottom of
planes
Q7PhysicsUnit 5: Rotational Motion
A and B are two solid spheres of equal masses. A rolls down an inclined plane
without slipping from a height B falls vertically from the same height. Then on reaching the ground. This question has multiple correct options
Q8PhysicsUnit 5: Rotational Motion
When a body starts to roll on an inclined plane, its potential energy is converted into
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Popular questions in Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotational motions
- The moment of inertia of a flywheel is \( 0.2 k g m^{2} \) which is initially stationary. constant external torque \( 5 …
- Assertion (A) : A wheel may be rotated with uniform angular velocity even though the tangential forces are applied on it…
- A solid sphere rolls without slipping on a rough horizontal floor, moving with a speed \( \boldsymbol{v} . \) It makes a…
- In a physical balance working on the principle of moments, when \( 5 \mathrm{mg} \) weight is placed on the left plan, t…
- A uniform rod of length \( l=1 m \) is kept as shown in the figure. \( \boldsymbol{H} \) is a horizontal smooth surface …
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