Home › CBSE Class 11 (Science) › Physics › System of Particles and Rotational Motion › Rotational kinetic energy of a rigid body is giv…
Rotational kinetic energy of a rigid body is given by which expression?
AIω2/2
BIω2
CI2ω/2
DIω/2
Answer & Solution
Correct answer: A. Iω2/2
Summing m v^2/2 over all particles with v = r w gives half of I times w squared.
Related questions
A cylinder rolls without slipping. What is the velocity of its contact point?A shell flying along a parabola explodes in mid-air by internal forces. Its fragments' CM Mechanical advantage of a lever is defined as which ratio?What is the support point of a lever called?Angular acceleration α is defined as which derivative?A particle moves in a circle of radius 3 m at angular velocity 2 rad/s. Its linear speed iA person on a spinning chair stretches both arms out. What happens to angular speed?For rotation about a symmetry axis, which relation links L and ω?