A0.50 kg ball has 3.0 j of kinetic energy, how fast is it moving?

3.464 m/s

Explanation:

The Kinetic Energy is mathematically expressed as:

  (1)

Where:

is the mass of the body

its velocity

Rewritting (1):

  (2)

Isolating :

  (3)

Finally:

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.