Introduction to Forces 7

A car accelerates at 2 m/s² when a force of 1000 N is applied. What is the mass of the car?

• 200 kg

• 500 kg

• 1000 kg

• 1500 kg

Two ice skaters push off against each other and move in opposite directions. Which of Newton's laws is this an example of?

• First Law

• Second Law

• Third Law

A book rests on a table. Which of Newton's laws explains why it remains at rest?

• First Law

• Second Law

• Third Law

Calculate the total net force acting on each of the objects and identify if the forces acting on each object are balanced or unbalanced.

• Net force: 10 N

  balanced

• Net force: 54 N unbalanced

• Net force: 37 N

  balanced

• Net force: 17 N

  unbalanced

The force that opposes motion between two surfaces in contact is called _______.

• Tension

• Gravitational Force

• Friction

• Electrostatic Force

The unit of force in the SI system is the ______.

• Newton (N)

• Joule (J)

• Watt (W)

• Kilogram (kg)

When a person jumps off a boat, the boat moves backward. This is an example of Newton's _____ Law.

• First Law

• Second Law

• Third Law

• Law of Inertia

What is the force acting on a book resting on a table that prevents it from falling through?

• Tension

• Normal Force

• Gravitational Force

• Electrostatic Force

Which of the following forces occurs between two masses, such as the Earth and an object, causing objects to fall toward the ground?

• Magnetic Force

• Gravitational Force

• Tension

• Electrostatic Force

What is the force transmitted through a rope or cable when pulled tight from opposite ends, such as in a tug-of-war?

• Gravitational Force

• Tension

• Normal Force

• Electrostatic Force