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 are the six types of simple machines?

Back

The six types of simple machines are lever, pulley, inclined plane, wedge, screw, and wheel and axle.

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it. It indicates how much a machine multiplies force.

Front

What is the formula for calculating work?

Back

Work (W) is calculated using the formula W = F × d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What is energy?

Back

Energy is the ability to do work or cause change. It exists in various forms, including kinetic, potential, thermal, and chemical energy.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is efficiency in machines?

Back

Efficiency is the ratio of useful work output to total work input, expressed as a percentage. It indicates how well a machine converts input energy into useful work.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state. For example, gravitational potential energy depends on an object's height.

Front

What is friction?

Back

Friction is the force that opposes the relative motion of two surfaces in contact. It converts kinetic energy into thermal energy, often resulting in heat.