Forces to know and FBD Video Quizizz

Which of the following statements is incorrect regarding Newton's First Law?

• An object can remain motionless with zero net force.

• If an object experiences a net force, its velocity must change.

• A constant net force is required for an object to keep moving.

• An object can move at a constant speed with zero net force.

What is the force that always acts to oppose relative motion between two surfaces?

• Tension

• Gravity

• Friction

• Normal force

Which force is always perpendicular to the surface an object is in contact with?

• Normal force

• Friction

• Gravity

• Tension

In a free body diagram, what does the length of an arrow represent?

• The mass of the object

• The speed of the object

• The direction of the object's motion

• The size of the force

If a book is at rest on a table, which forces are acting on it?

• Only normal force

• Gravity and normal force

• Only gravity

• Gravity and friction