CBSE Class 11 System of Particles and Rotational Motion — practice questions
45 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 System of Particles and Rotational Motion in the app →A child pushes a door of width $0.8$ m perpendicular to the door at the handle with $20$ N force. The torque aA solid disc of mass $M$, radius $R$, rotating about its centre axis has moment of inertia:An ice skater spinning with arms outstretched at $\omega_1$ pulls arms in, halving her moment of inertia. Her A bicycle wheel of radius $R$ rolls without slipping at linear speed $v$. The angular speed $\omega$ is:A body with a perfectly definite and unchanging shape is called:In a rigid body, the distances between pairs of particles:Is any real body truly rigid?Fixing a body along a straight line leaves only which motion?The fixed line about which a body rotates is its:The rotational counterpart of force is the moment of force, also called:Torque is which kind of quantity?The SI unit of the moment of force is the:If the directions of both r and F are reversed, the torque direction:The rotational analogue of mass is the:The SI unit of moment of inertia is:Moment of inertia is written as M times which square?The length k in that expression is called the radius of:Moment of inertia measures a body's rotational:Which machine is named as using this property practically?Conservation of angular momentum means conservation of how many components?Conservation of angular momentum is the rotational analogue of conserving:For rotational equilibrium, the sum of the torque components must be:In a rotating rigid body, each particle moves in:A body whose shape never changes and whose particles keep fixed distances apart is a:A block slides down a ramp with every particle moving at the same velocity. Its motion is:A cylinder rolling down a ramp is a combination of translation and:For a cylinder rolling without slipping, the point touching the ground has velocity:The fixed line about which a ceiling fan turns is its:Torque is the rotational analogue of:Pushing a door on its hinge line produces:A rigid body in mechanical equilibrium has zero total force and zero total:Mechanical equilibrium of a rigid body requires how many independent conditions?Two equal and opposite forces with different lines of action form a:A light rod pivoted at a point is an ideal lever. The pivot is the:For a lever, load arm times load equals effort arm times:A lever lifts a big load with a small effort when the effort arm is:You balance a cardboard sheet on a pencil tip. The balance point is its:In uniform gravity the centre of gravity coincides with the:The rotational analogue of mass is:Does the moment of inertia change if a body spins faster?Car engines carry a heavy disc that smooths out jerky speed changes. It is a:The theorem of perpendicular axes applies to bodies that are:When no external torque acts, what stays constant?Spinning on a swivel chair, you stretch your arms out. Your spin:Stretching your arms while spinning slows you because it increases your: