Week #15 - Exit Flashcard - Unit 3 - Work and Energy Concepts

Front

What is the definition of Work in physics?

Back

Work is defined as the transfer of energy that occurs when an object is moved over a distance by an external force. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

What is the unit of measurement for Work and Energy?

Back

The unit of measurement for both work and energy is the joule (J).

Front

How is Work calculated?

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

Does pushing against an object that does not move count as Work?

Back

No, if an object does not move, no work is done, regardless of the force applied.

Front

If a boy pushes a bucket of water on the floor, is he doing Work?

Back

Yes, if the bucket moves as a result of the push, work is being done on the bucket.

Front

What is the relationship between Work and Energy?

Back

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

Front

What is the formula for calculating kinetic energy?

Back

The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, such as gravitational potential energy.

Front

What is the principle of conservation of energy?

Back

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

Front

What is the difference between work done against gravity and work done against friction?

Back

Work done against gravity involves lifting an object to a height, while work done against friction involves overcoming the resistance that opposes motion.