AP 1 Work and Energy EC

Front

What is 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. It is calculated using the formula: Work = Force × Distance × cos(θ), where θ is the angle between the force and the direction of motion.

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. In a closed system, the total energy remains constant.

Front

What is kinetic energy?

Back

Kinetic energy is the energy possessed by an object due to its motion. It is calculated using the formula: KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. For gravitational potential energy, it is calculated using the formula: PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height above a reference point.

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What is a closed system in physics?

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A closed system is a physical system that does not exchange matter with its surroundings, although it may exchange energy. The total energy within a closed system remains constant.

Front

How is work related to energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object, resulting in a change in its kinetic or potential energy.

Front

What is the formula for gravitational potential energy?

Back

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

Front

What happens to kinetic energy at maximum height during projectile motion?

Back

At maximum height, the kinetic energy of a projectile is at its minimum (zero if it momentarily stops), while its potential energy is at its maximum.

Front

What is the relationship between speed and kinetic energy?

Back

Kinetic energy is proportional to the square of the speed of an object. Doubling the speed of an object results in quadrupling its kinetic energy.

Front

What is the area under a force vs. distance graph?

Back

The area under a force vs. distance graph represents the work done on an object. It quantifies the energy transferred to the object by the applied force.