The kinetic energy of flywheel of a stationary engine is 120J.
<u>Explanation:</u>
Key Terms:
- torque: A rotational or twisting effect of a force; (SI unit newton-meter or N m; imperial unit foot-pound or ft-lb)
- inertia: The property of a body that resists any change to its uniform motion; equivalent to its mass.
- angular velocity: A vector quantity describing an object in circular motion; its magnitude is equal to the speed of the particle and the direction is perpendicular to the plane of its circular motion.
Here , angular acceleration = 2
Angular velocity w = Angular acceleration × time
∵ Acceleration is 2 rad per second sq. So , time is 1 sec.
⇒ Angular velocity (w) =
⇒ Angular velocity (w) =
Now, kinetic energy ⇒
⇒
⇒
⇒
∴ The kinetic energy of flywheel of a stationary engine is 120J.
Answer:
Explanation:
As we know by radioactivity law
so here we will have
now we will have
now we also know that
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