Two objects exert a push or pull across a gap. How is this interaction classified?

What force makes a notebook fall after Bea lets go of it?

A balloon rubbed with cloth draws loose hair toward it without touching. What force causes this?

An iron paper clip moves toward a bar with north and south poles across a gap. What force pulls the clip?

A book stays at rest on a table. What upward force does the tabletop exert on the book?

Liza carries a bag by its stretched handle. What force in the handle supports the bag?

A ball rolls across a rough floor and slows down. What force from the floor resists its motion?

What name is given to the push Carlo gives a bottle with his hand?

What names the region around an object where it can exert a push or pull on another object?

The symbols show positive and negative charges. What is the overall electrical state of the object shown?

The symbols show the charges on objects A and B. How will they affect each other when brought close together?

Study the charge symbols on objects A and B. Predict their motion if both are free to move.

Does water falling from an open faucet need to touch the ground for Earth's pull to act?

Can a bar with north and south poles strongly pull every kind of metal?

A rubbed balloon approaches an unrubbed balloon with no overall charge. What can happen before they touch?

A bar with north and south poles draws an iron clip toward it. What usually happens to its pull as the gap increases?

A coin rests on a card above a cup. How do the upward support and downward pull compare while the coin stays still?

A coin rests at the center of a smooth card over a cup. The card is flicked sideways quickly. What usually happens to the coin?

Earth and the Sun attract each other gravitationally. Which property of both objects causes this attraction?

Carlo throws a ball upward. While it rises after leaving his hand, which direction does Earth's gravitational force act?