8.2 Types of forces: Non-contact

Which of the following is NOT a type of non-contact force discussed in the text?

• Gravity

• Magnetic forces

• Friction

• Electrostatic forces

What is the force of attraction between an object and the Earth called?

• Magnetism

• Air resistance

• Gravity

• Magnetic force

What causes different objects to fall at different rates, according to Galileo's experiments?

• Weight

• Air resistance

• Magnetism

• Electric charge

What is the term for the speed at which air resistance equals weight for a falling object?

• Freefall speed

• Terminal velocity

• Gravitational pull

• Magnetic field

What is the primary force responsible for making an object fall to the ground?

• Air resistance

• Magnetism

• Electrostatic force

• Gravity

What did Galileo use to measure time in his experiments involving the falling objects?

• A clock

• A ruler

• His pulse

• A stopwatch

What do wires carrying electricity create around them?

• Magnetic fields

• Gravitational fields

• Electromagnetic waves

• Air resistance

Which of the following materials does NOT attract magnets?

• Iron

• Cobalt

• Wood

• Nickel

What is the force field around charged particles where the electrostatic force acts called?

• Magnetic field

• Gravitational field

• Force field

• Electrostatic force field