Work and Simple Machines Test Review

What instrument would be used to measure the force that is applied to lift something?

• gram balance
• meter stick
• stop watch
• spring scale

What type of pulley does not reduce the amount of effort and only changes the direction of the force?

• grooved
• fixed
• movable
• complex

A simple machine reduces the force required to do work by changing the ___ or direction of the force.

• work
• distance
• motion

The unit for force is ___.

• Tons
• Inches
• Newtons
• Neutrons

Mechanical ___ measures how well a machine converts input energy, work, and power into output energy, work, and power.

• efficiency
• energy
• motion

The name of the fixed point that a lever is free to move around is called a ___.

• wheel and axle
• wedge
• screw
• fulcrum

Inclined planes that are wound around a post or cylinder are called ___.

• block and tackle systems
• wedges
• screws
• ramps

Pulleys that are ___, meaning that they are not attached to a structure, can be found on construction cranes.

• movable
• fixed
• complex
• grooved

Door knobs and steering wheels are examples of ___.

• inclined planes
• pulleys
• wheel and axles
• levers

Pulleys that are ___, meaning that they are attached to a structure, can be found on window blinds.

• fixed
• movable
• complex
• grooved