Chapter 3: Simple Machines Flashcard

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, and inclined planes.

Front

What is the unit of work?

Back

The unit of work is the Joule (J). It is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter.

Front

What is an example of a simple machine?

Back

An example of a simple machine is a pulley, which is used to lift heavy objects by changing the direction of the force applied.

Front

What is the purpose of an inclined plane?

Back

An inclined plane is used to raise objects by allowing them to be moved up a slope, reducing the amount of force needed compared to lifting them vertically.

Front

What is work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

What is power?

Back

Power is the rate at which work is done or energy is transferred. It is measured in watts (W), where one watt equals one joule per second.

Front

How does a screw function as a simple machine?

Back

A screw converts rotational motion into linear motion, allowing it to hold objects together or lift materials.

Front

What is the difference between distance and displacement?

Back

Distance is the total path length traveled, while displacement is the shortest straight line from the starting point to the endpoint, including direction.

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum, used to lift or move loads.

Front

What is the mechanical advantage of a simple machine?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied, indicating how much a machine multiplies force.