chp 9 energy flashcardizz review

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred, measured in watts (W).

Front

How is power calculated?

Back

Power (P) = Force (F) x Distance (d) / Time (t).

Front

What is kinetic energy?

Back

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

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) x Distance (d).

Front

What type of lever is a second-class lever?

Back

A second-class lever has the load between the effort and the fulcrum, like a jack used to lift a car.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is energy of motion, while potential energy is stored energy based on an object's position.

Front

What is sound energy?

Back

Sound energy is a form of kinetic energy that consists of molecules vibrating in rhythmic patterns.

Front

What is the unit of energy?

Back

The unit of energy is the joule (J).

Front

What is mechanical advantage?

Back

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

Front

What is the principle of conservation of energy?

Back

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