Mechanical Advantage and Simple Machines Quiz

A simple machine that consists of a rigid bar that pivots around a fixed point called a fulcrum, used to multiply force or change the direction of force.

A simple machine that consists of a wheel with a groove around its circumference, used to change the direction of force and make it easier to lift objects.

A simple machine that consists of a sloping surface, used to move objects over a distance with less effort.

A simple machine that consists of a spiral piece of metal with a groove on its surface, used to fasten objects together or to lift heavy objects.

A simple machine that consists of two or more wheels with teeth that mesh together, used to transmit power and change the speed or torque of a rotating system.

The ability of a machine to amplify the input force, making it easier to lift heavy loads or move objects.

When the effort force is less than the load force, the machine provides a force advantage.

The ratio of the load force to the effort force. A higher mechanical advantage means you need to use less effort to move a heavier load.

The ratio of work output to work input, expressed as a percentage.

A measure of how effectively a machine converts input energy into useful output energy. It is expressed as a percentage.

Friction is the primary reason why mechanical systems lose energy and become less efficient.

Adding lubricants to moving parts reduces friction, resulting in a higher efficiency.

It states that pressure applied to an enclosed fluid is transmitted equally to all points in the fluid and to the walls of the container.

A hydraulic system uses an incompressible fluid, typically oil, to transmit power for lift and force.

A pneumatic system uses a compressible gas, typically air, to transmit power.

Increasing the area of the output piston in a hydraulic lift will increase the output force.

An idler gear is a non-driving gear in a gear train that changes the direction of rotation but does not affect the overall gear ratio.

A gear ratio greater than 1 indicates a force advantage, meaning less input force is needed to move a larger load.

Reducing gears are most useful in situations where a higher force is needed to overcome resistance, like uphill hauling, as they provide a force advantage.

An idler gear has no effect on speed or force, its primary role is to change the direction of rotation.

Decreasing the effort force needed, making it easier to move objects.

Efficiency measures how much of the input energy is converted into useful output energy. A high efficiency means less energy is wasted as heat.

The gear ratio is calculated by dividing the number of teeth on the follower gear by the number of teeth on the driver gear.

A machine with high efficiency converts a larger percentage of input energy into useful output energy, resulting in less energy waste.

The amount of force applied over a specific distance.

The formula for calculating work is Work = Force x Distance.

The unit of measurement for work is the Joule (J).

Energy is the ability to do work. It cannot be created or destroyed, only transformed from one form to another.

Potential energy is stored energy due to an object's position or state.

Kinetic energy is the energy of motion.

The unit of measurement for energy is the Joule (J).

The transformation of energy from one form to another is called energy transformation.

The conversion of one form of energy into another.

The energy stored in an object due to its position or configuration.

The energy possessed by an object due to its motion.

The ratio of the output force to the input force of a machine. It tells us how much the machine amplifies our effort.

The energy that a system has due to its pressure.

The amount of work done by a machine is calculated by multiplying the force applied by the distance moved in the direction of the force.

A lever with a longer effort arm than a load arm will provide a force advantage, meaning less effort is needed to move a heavier load.