Work and Energy Flashcard

Front

What is the scientific definition of work?

Back

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object moves in the direction of the force.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, typically calculated as PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you calculate work done?

Back

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

Front

What is mechanical advantage?

Back

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device, or machine. It is the ratio of output force to input force.

Front

What happens to mechanical energy when a bicycle stops?

Back

When a bicycle stops, its mechanical energy is converted into other forms of energy, such as thermal energy due to friction from the brakes.

Front

If a machine has a mechanical advantage greater than one, what can be said about the output force?

Back

The output force is greater than the input force.

Front

What is the formula for calculating gravitational potential energy?

Back

The formula for gravitational potential energy is PE = mgh, where m is mass, g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height.

Front

How much work is done when lifting an object?

Back

The work done in lifting an object is equal to the weight of the object multiplied by the height it is lifted: W = mgh.

Front

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

Back

The unit of work is the Joule (J). One Joule is defined as the work done when a force of one newton displaces an object by one meter.

Front

What is the relationship between work and energy?

Back

Work is a means of transferring energy from one system to another. When work is done on an object, energy is transferred to that object.