Friction

The force of gravity acting on an object is the object's ______.

• Mass
• Matter
• Weight 
• Terminal velocity 

What is the force acting between any two objects in the known universe all the time?

• Gravitational Force 
• Force of Friction 
• Normal Force 
• Electromagnetic Force 

With unbalanced forces, the object will move in the direction of the _______ force.

• larger 
• smaller 
• equal 

What type of fluid friction acts on an object moving through the air?

• Friction 
• Normal Force 
• Gravity 
• Air resistance 

Imagine you travel to another planets. What will change as you walk around the surface of the planet- your mass or your weight?

• Mass
• Weight 
• Both 
• Neither 

Friction is a force that acts in a(n) ___________ direction relative to a moving object.

• similar
• opposite
• parallel
• perpendicular

 What is the unit that measures force?

• Weight
• Net force
• Newton
• Kilogram

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at a constant speed.

What is friction?

• It is a resistance force
• Friction  does not exist
• It is an imaginary force
• It is red

How do you lower the friction force?

• By a smooth surface
• By a rough surface
• By not pushing hard
• By pushing down