Forces at a Distance

Fields exist around ________ forces.

• Contact
• NonContact
• Contact and noncontact

Which statement is true?

• The Earth has more gravity than the sun.
• The sun has more gravity than the Earth.
• The moon has more gravity than the Earth.
• They all have equal gravitational force.

Which statement is true of the diagram below?

• The arrows represent mass.
• The arrows represent velocity (speed).
• The arrows represent gravitational force.
• The arrows represent motion.

Which statement best explains why a satellite can orbit the Earth?

• A satellite moves at a constant speed and in a circular direction keeping it from slamming into Earth.
• The satellite depends on a constant input of energy from its engine to keep a circular orbit.
• Heavier things, like a satellite, will always move in a circular motion around earth.
• As the satellite moves in a straight line, the pull of gravity causes it to get pulled slightly into a curved path.

Which diagram below would represent the greatest gravitational force interaction?

• 
• 

Describe what would happen to the magnets in the diagram below.

• They would attract
• They would repel
• They would not move
• There is not enough information to know.

What will happen if you put the north pole of a magnet next to the north pole of another magnet?

• The magnets will move toward each other.
• The magnets will push away from each other.
• The magnets will not move at all.
• The magnets will change charges.

Where is the magnetic field the strongest?

• A
• B
• C
• D

Magnets can attract through air, water, fabric, and wood.

• True
• False

Which of the following are true of static electricity charges?

• Like charges repel
• Like charges attract