Contact Forces

Which type of force(s) will cause a change in an object's motion?

• gravity
• zero net force
• balanced forces
• unbalanced forces

What is the name for a push or pull?

• A movement
• A force
• Speed
• Density

friction is a force that acts 

• in the same direction as the motion
• opposite to the direction of the motion
• opposite to the applied forces
• the same direction as the applied force

You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.

• 20N 
• 40N 
• 10N 
• 70N

What Unit do we Measure Force in? 

• Newtons
• Joules
• Force
• Don't know

Which has more Inertia? (so need more force to move) 

• Truck
• Ant
• A cat
• A skateboard

Any change in an objects speed or direction

• Inertia
• Force
• Acceleration
• Reaction

Why is it harder for the boy in Image B to get down the hill?

• Motion
• Friction
• Work
• Displacement

If I kick a soccer ball across the field, what vocabulary word tells me why the ball would slow down in the grass?

• acceleration
• friction
• gravity

What does the word "contact" mean?

• to touch

• to move

• to write

• to read