Quiz 2.1 - 2.2

Balance forces acting on an object cause the object to accelerate.

• True
• False

A ball thrown horizontally. Gravity causes the ball to continue to move horizontally. 

• True 
• False

Friction is a force that slows down motion between two surfaces that are in contact.

• True
• False

Acceleration is caused by a balanced force. 

• True
• False

You push a book and it moves. The force acting on it must be unbalanced. 

• True 
• False

If an unbalanced force is action on a rope, the rope will accelerate in the direction of the unbalanced force. 

• True
• False

Sliding friction keeps you in the seat when a car goes around the corner. 

• True
• False

Which of the following is an example of a non-contact force?

• musician playing the piano
• athlete hitting a ball with a bat
• a ball falling after you toss it in the air
• karate expert breaking a stack of wood

An arrow can be used to represent a force. The length of the arrow represents ____________. 

• direction of the force
• strength of the force
• mass of the force
• acceleration of the force

Am objects weight is ________ its mass

• equal to
• less than
• proportional to
• greater than