Work and Energy

Front

What is the formula for calculating work done?

Back

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

Front

Define power in the context of work and energy.

Back

Power is the rate at which work is done, calculated as Power (P) = Work (W) / Time (t). It is measured in Watts (W).

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy (KE) is the energy of an object in motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy and how is it calculated?

Back

Potential energy (PE) is the stored energy of an object due to its position, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate average power when lifting an object?

Back

Average Power = Work done / Time taken. For lifting, Work = Force × Distance.

Front

What happens to potential energy as a pendulum swings to its highest point?

Back

At the highest point, potential energy is at its maximum while kinetic energy is at its minimum.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy. Work transfers energy from one system to another.

Front

If an object is lifted vertically, what type of energy is primarily involved?

Back

Potential energy is primarily involved when an object is lifted vertically.

Front

What is the unit of work and how is it defined?

Back

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

Front

How do you calculate the work done by a force at an angle?

Back

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