Abaseball has a mass of 0.15 kg and radius 3.7 cm. in a baseball game, a pitcher throws the ball with a substantial spin so that it moves with an angular speed of 50 rad/s and a linear speed of 48 m/s. assuming the baseball to be a uniform solid sphere, determine the rotational and translational kinetic energies of the ball.

Rotational kinetic energy is 0.513 j

Transnational kinetic energy is 172.8 j                      

Explanation:

We have given mass of the baseball m = 0.15 kg

radius r = 3.7 cm = 0.037 m

Angular velocity is given as

Linear velocity v = 48 m/sec

We know that moment of inertia is given by

Now rotational kinetic energy is given by

Now transnational kinetic energy is given by

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

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