Pedro uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples.

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

What determines the amount of inertia an object has

The heliocentric and the geocentric models of the solar system included these central principles