What is the formula for speed and velocity and give me a prime example please and thank you!

  speed = distance/time

  velocity is speed together with the direction of movement

Explanation:

Every speed limit sign tells you ...

  speed = miles/hour

Of course, the units can vary, but the general form is ...

  speed = distance/time

where "distance" is the magnitude of the displacement in the associated time period.

For example, if you travel 30 miles in 45 minutes, your speed in miles per hour is ...

  speed = (30 mi)/(3/4 h) = 30·4/3 mi/h = 40 mi/h

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Velocity is a vector quantity, so has both magnitude (speed) and direction. It might be defined as ...

  velocity = displacement/time

where displacement is a vector quantity.

For example, if you travel 30 miles east and 40 miles north in 1 hour, your average velocity is

  velocity = (30, 40)/1 = (30, 40) mi/h . . . . . in (east, north) coordinates

  = 50∠36.87° mi/h . . . . . in "polar" coordinates with the angle being a bearing angle measured clockwise from north

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explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

double the distance = divide strength by 4