Work and Power

Front

What is the formula to calculate work?

Back

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

Front

What is the definition of power in physics?

Back

Power is the rate at which work is done or energy is transferred over time.

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

If 1,000 J of work is done in 10 seconds, what is the power output?

Back

Power = Work / Time = 1,000 J / 10 s = 100 W.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

What is the unit of work?

Back

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

Front

What is an example of work being done?

Back

Lifting a box is an example of work being done because a force is applied to move the box over a distance.

Front

In which scenario is no work done?

Back

Pushing against a stationary wall is an example where no work is done because there is no movement.

Front

What is the definition of kinetic energy?

Back

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

Front

What is the definition of potential energy?

Back

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