Speed is defined as the total distance covered per unit time and the velocity is defined as the total displacement per unit time.
Speed is a scalar quantity and velocity is a vector quantity. The quantities that have both magnitude and direction are vector quantity and the quantity that have only magnitude are scalar quantity.The SI unit of both velocity and speed is m/s.
So, the correct option is (c) " velocity is a vector and requires a direction ".
Answer: C) velocity is a vector and requires a direction.
Explanation:
In physics, there are two types of quantities:
- scalars: these are quantities that have only a magnitude
- vectors: there are quantities that have both magnitude and direction
As an example, speed is a scalar while velocity is a vector. Therefore, speed has only a magnitude, while velocity has both magnitude and direction: therefore, the difference between the two quantities is that velocity is a vector and requires a direction, as stated in option C.
First let's convert everything into SI units. The length of the blade is 3 inches. Keeping in mind that 1 inc=0.025 m, we have The angular speed is 600 revolutions per minute. Keeping in mind that and , the angular speed becomes
And so, the linear velocity of the edge of the blade is equal to
Explanation: Solids have very little movement and the particles have barely enough movement to vibrate. We can't see it but the particles are indeed vibrating. Solids have the least amount of kinetic energy which is moving energy.
and 
, the angular speed becomes
