Work, Energy, and Power Concepts

Front

What is the definition of work in physics?

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.

Front

What is energy?

Back

Energy is the ability to cause movement or do work. It exists in various forms, such as kinetic energy and potential energy.

Front

What is power in the context of work?

Back

Power is the rate at which work is done or energy is transferred. It is calculated as Power = Work / Time.

Front

How does increasing the time of impact reduce collision injuries?

Back

Increasing the time of impact reduces the force experienced by the body during a collision, thereby decreasing the likelihood of injury.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

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

Front

What is the formula for calculating work?

Back

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

Front

If a force of 70N is applied over a distance of 1.1 meters, how much work is done?

Back

77 joules.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy. Energy can be transferred or transformed through work.

Front

What is the unit of power?

Back

The unit of power is the watt (W), which is equivalent to one joule per second.