which is not a simple machine?

• spring
• wedge
• pulley
• screw

Flagpole

• wedge
• pulley
• incline plane
• wheel and axle

A _____ pulley only changes the direction of the force.

• movable
• fixed
• alternate

This device

• wedge
• lever
• incline plane
• wheel and axle

What type of simple machine is this?

• wheel and axle
• gear
• lever
• inclined plane

Josh is pushing wood in a wheelbarrow. What 3 simple machines are in use?

• inclined plane, screw, pulley
• inclined plane, lever, wheel and axle 
• inclined plane, screw, wheel and axle
• inclined plane, wheel and axle, pulley

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Force = Mass x Acceleration

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

A force that opposes motion between a surface in contact with the atmosphere.

• air resistance
• gravity
• momentum
• terminal velocity

When all the forces on an object are equal and opposite, & the net force is zero, that's...

• balanced forces
• unbalanced forces
• terminal velocity
• reaction forces