Understanding Simple and Compound Machines

Which of the following best describes a simple machine?

• A device that requires electricity to function.

• Mechanisms that manipulate magnitude of force and distance.

• A machine that operates without any moving parts.

• A complex system of gears and pulleys.

What is a compound machine?

• A machine that uses only one type of simple machine.

• Simple machines working in combination to complete a task.

• A machine that does not provide any mechanical advantage.

• A machine that operates solely on solar power.

How is mechanical advantage calculated?

• By measuring the weight of the machine.

• By calculating the ratios that allow manipulation of speed, distance, force, and function.

• By counting the number of moving parts in a machine.

• By determining the power source of the machine.

Which of the following is a characteristic of a lever?

• It is a wheel with a groove in its rim.

• It is a flat surface set at an angle.

• It is a rigid bar used to exert pressure or sustain weight.

• It is a wheel fixed to a shaft.

What is the primary function of a wheel and axle?

• To change the direction of a force.

• To act as a lever arm fixed to a shaft.

• To provide a flat surface for objects to slide down.

• To tighten by being driven into something

Which statement best describes a pulley?

• A device that only increases speed.

• A lever consisting of a wheel with a groove in its rim.

• A flat surface set at an angle with no moving parts.

• A machine that does not change the direction of force.

What is an inclined plane?

• A machine that requires a motor to function.

• A flat surface set at an angle or incline with no moving parts.

• A device that only works in a vertical position.

• A complex system of gears and levers.

Which of the following is an example of a simple machine?

• A bicycle.

• A seesaw.

• A computer.

• A car engine.

How do compound machines differ from simple machines?

• They require less force to operate.

• They have a multiplicative effect on the mechanical advantage.

• They are easier to design and build.

• They do not provide any mechanical advantage.

Which of the following best illustrates mechanical advantage?

• A machine that uses more energy than it produces.

• A system that allows a small force to move a large object.

• A device that operates without any external force.

• A machine that decreases the speed of an object.