GK
PHYSICS
Question
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2.0J


2.5J


5.0J


It cannot be determined without knowing the radius

Detailed explanation1: The rotational kinetic energy is the kinetic energy of rotation of a rotating rigid body or system of particles, and is given by K=12I2 K = 1 2 I 2, where I is the moment of inertia, or “rotational mass” of the rigid body or system of particles.
Detailed explanation2: At time t = 0 the cylinder is at rest. At time t = 2 seconds its angular velocity is 1 radian per second.
Detailed explanation3: Its formula is: (KE)T=12(mv2) ( K E ) T = 1 2 ( m v 2 ) where (KE)T ( K E ) T is the translational kinetic energy, m is the mass of the object, and v is the translational/linear velocity of the object.
Detailed explanation4: Rotational energy also known as angular kinetic energy is defined as: The kinetic energy due to the rotation of an object and is part of its total kinetic energy. Rotational kinetic energy is directly proportional to the rotational inertia and the square of the magnitude of the angular velocity.