Two objects each carry positive charge and are brought near. What happens?
A magnet can push another magnet away. A charged balloon can push another charged balloon away. Can Earth ever push you away?
No. Gravity is the odd one out among the three fields, and this lesson states why it is odd.
The magnetic force can repel: like poles push apart. The electric force can repel: like charges push apart.
No experiment has ever observed gravitational repulsion: masses never push each other apart.
Earth pulls you toward it, and you pull Earth toward you.
Two parked trucks sit side by side. What does the gravitational force between them do?
Two bowling balls on a rack pull each other together. The force is far too small to feel, but it still pulls the pair together.
Flipped over, cooled, or sped up, a mass still feels the same attraction.
Polly says flipping one of two stones upside down makes the gravitational force between them push instead of pull. Is Polly correct?
The Sun and Mars both have mass. What does the gravitational force between them do?
The Sun and Mars are two masses.
The gravitational force between two masses always pulls them toward each other.
The force pulls the Sun and Mars toward each other.
A student says no experiment has ever found two masses pushing each other apart by gravity. Is the student correct?
Which statement about the gravitational force between two masses is correct?
A magnetic field can push another magnet away. What can a gravitational field do to a mass inside it?
Which pair of objects can never push each other apart?