G8 Force and Energy basics

When forces on an object are balanced, what is the net force?

• 0

• 5

• 10

• 21

What is the net force?

• 400 N Up
• 400 N Down
• - 400 N Down
• 800 N Down

What is the net force

• 10 N
• 0 N
• 25 N
• 1 N

A _____ is a pull or a push.

• force
• friction
• gravity
• speed

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

Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 

• feathers 
• iron
• same
• depends on their friction

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

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the net force?

• 50N to the left.
• 350N to the left.
• 350N to the right.
• 50N to the right.

During which interval is the object speeding up?

• A to B
• B to C
• D to E
• E to F

What is this graph showing?

• Constant Speed
• Acceleration (speeding up)
• Deceleration (slowing down)
• No motion