Understanding Real World Forces

Which of the following forces is responsible for keeping objects on the ground?

• Friction

• Magnetic

• Normal

• Gravity

Fill in the blank: People use forces in many real-world applications, from the simple (picking up a pencil) to the _______ (launching a satellite into space).

• A) easy

• B) complex

• C) normal

• D) magnetic

Fill in the blank: More than one force can act on an object at a time. This is an example of _______ forces.

• single

• multiple

• normal

• magnetic

Which force acts perpendicular to the surface of contact?

• Friction

• Magnetic

• Normal

• Gravity

Fill in the blank: The force that acts at a distance and can attract or repel is called _______ force.

• friction

• magnetic

• normal

• gravity

What is the main topic of the text?

• Types of energy

• Real world forces

• Space exploration

• Simple machines

Which force is not mentioned in the text?

• Friction

• Magnetic

• Tension

• Gravity

Which of the following is a type of force discussed in the lesson?

• Gravity

• Light

• Sound

• Heat

Fill in the blank: _______ is the force that pulls objects toward the center of the Earth.

• Friction

• Magnetism

• Gravity

• Applied force

What type of force is responsible for the resistance you feel when sliding a book across a table?

• Gravity

• Friction

• Magnetism

• Normal force