Windmill Rotation Energy Source
Windmills rotate because they capture the energy of moving air.
Moving air, like the wind, possesses kinetic energy, which is the energy of motion.
The large blades of a windmill are designed to catch the wind. As the wind flows past the blades, it exerts a force, transferring its kinetic energy to the blades and causing them to spin.
Energy Options Analysis
- Wind's kinetic energy: This is the correct source. The motion of the wind directly drives the windmill's rotation.
- Elastic energy: This is stored energy, not the energy source for wind's motion.
- Sound energy: This is energy from vibrations, unrelated to the force that spins windmill blades.
- Light energy: This is energy from sunlight and does not directly cause the wind to spin the blades.
Therefore, the rotation of windmill blades is primarily due to the wind's kinetic energy.
Important Questions from Kinetic Energy
An object of mass 10 kg is moving with a uniform velocity of 2 m/s. What will be the kinetic energy of the object?
In an experiment, the velocity of a non-relativistic neutron is determined by measuring the time (~50 ns) it takes to travel from the source to the detector kept at a distance L. Assume that the error in the measurement of L is negligibly small. If we want to estimate the kinetic energy T of the neutron to within 5% accuracy, i.e., IδT / T I ≤ 0.05, the maximum permissible error Iδt Iin measuring the time of flight is nearest to
The kinetic energy of the particles of ______ is maximum.
- Calculate the kinetic energy of a body of mass 10 kg moving with a uniform velocity of 5 m s-1.
Two metallic blocks having masses in the ratio 2 : 3 are made to slide down a friction less inclined plane starting initially from rest position. When these blocks reach the bottom of the inclined plane, they will have their kinetic energies in the ratio
