Work, Power and Energy

Front

What is the formula for calculating work?

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 physics.

Back

Power is the rate at which work is done or energy is transferred, measured in watts (W).

Front

What is the unit of power?

Back

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

Front

How do you calculate power using work and time?

Back

Power (P) = Work (W) / Time (t).

Front

If a person does 200 J of work in 10 seconds, what is their power output?

Back

Power = 200 J / 10 s = 20 W.

Front

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

Back

Work is done when a force causes an object to move a certain distance in the direction of the force.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 0.5 × mass (m) × velocity (v)².

Front

What is potential energy?

Back

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

Front

How do you calculate gravitational potential energy?

Back

Gravitational Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h).

Front

What is the principle of conservation of energy?

Back

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