How are forces measured?

• In Joules

• In Watts

• In Newtons

• In Pascals

Which of the following is a contact force?

• Gravity

• Magnetic force

• Push

• Electrostatic force

What is the formula for force according to Newton's Second Law?

• F = m + a

• F = m / a

• F = m × a

• F = m - a

What unit is used for force in Newton's Second Law?

• Joule

• Watt

• Newton

• Pascal

What does Newton's Third Law state?

• For every action, there is an equal and opposite reaction

• Objects in motion stay in motion

• Force equals mass times acceleration

• Energy cannot be created or destroyed

What is the force that pulls objects toward Earth's center?

• Friction

• Air resistance

• Gravity

• Balanced forces

What type of friction is caused by air?

• Static friction

• Sliding friction

• Rolling friction

• Air resistance

What happens when forces are equal and opposite?

• The object accelerates

• The object changes direction

• The object doesn't change motion

• The object increases speed

Which of the following is an example of balanced forces?

• Rocket propulsion

• Book on table

• Falling object

• Swimming

Which type of friction involves objects in motion?

• Static friction

• Sliding friction

• Rolling friction

• Air resistance