Matter & Energy Unit 3 Flashcard Prep

Front

What is the formula for calculating work done against a force?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

If 250 joules of work is done on an object with a force of 50 newtons, what is the distance moved?

Back

5.0 meters.

Front

How much work is done when lifting an object?

Back

Work is calculated as the product of the weight of the object and the height it is lifted: Work = Weight × Height.

Front

What is the work done when a rock weighing 10 newtons is lifted 8 meters?

Back

80 joules.

Front

What type of energy is stored in food, batteries, and gasoline?

Back

Chemical energy.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, also known as heat energy.

Front

What is the purpose of solar panels?

Back

To convert solar energy into electrical energy.

Front

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

Back

Joule (J).

Front

What is the relationship between work, force, and distance?

Back

Work is directly proportional to both the force applied and the distance over which the force is applied.

Front

What is gravitational potential energy?

Back

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