Which force produces a change in motion?

• unbalanced force
• balanced force
• gravitational force
• frictional force

What pulls a ball back to earth?

• Gas
• Gravity
• Friction
• Molecules

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

What is the SI unit used to measure force? 

• Pounds 
• Grams 
• Newtons 
• kg/ m²

What is motion?

• It's like the ocean
• Any change in person's mass.
• Motion is like acting
• Any change in an object or person's position.

What is the net force on the block? (click on the words to view the picture)

• 5 Newtons, up
• 5 Newtons, down
• 15 Newtons, up
• 15 Newtons, down

A combination of all forces acting on an object at the same time is a

• net force
• balacned force
• equilibrium
• inertia

To calculate net force, when forces are acting in opposite directions, the forces are ...

• added 
• subtracted 
• mutiplied 
• divided 

What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

What is the net force?

• 17 N Right
• 3 N Right
• 3 N Left
• 17 N Left