Work and Energy Flashcard

Front

What is the definition of work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force.

Front

How is power defined in relation to work?

Back

Power is the rate at which work is done, calculated as work done divided by the time taken to do that work.

Front

What is gravitational potential energy (GPE)?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, typically calculated as GPE = mass × gravity × height.

Front

What is the formula for calculating total mechanical energy?

Back

Total mechanical energy is the sum of kinetic energy and potential energy in a system, expressed as E_total = KE + PE.

Front

What condition must be met for work to be done?

Back

For work to be done, the force applied must act in the same direction as the displacement of the object.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the joule (J), which is equivalent to one newton-meter.

Front

How do you calculate the depth of a pit using work and energy principles?

Back

The depth can be calculated using the formula: Work = Force × Distance, where Force is the weight of the object (mass × gravity) and Distance is the depth.

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy is the energy of an object in motion, calculated using the formula KE = 0.5 × mass × velocity².

Front

What is the relationship between work, energy, and power?

Back

Work is the transfer of energy, power is the rate of doing work, and energy is the capacity to do work.

Front

What factors affect gravitational potential energy?

Back

Gravitational potential energy is affected by the mass of the object, the height above the reference point, and the acceleration due to gravity.