Calculating Work Done

Front

What is the formula for calculating work done?

Back

Work done (W) is calculated using the formula W = F × d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What are the units of work?

Back

The unit of work is the joule (J).

Front

If a force of 20 N is applied to move an object 5 m, how much work is done?

Back

Work done = 20 N × 5 m = 100 J.

Front

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

Back

Work is directly proportional to both the force applied and the distance moved in the direction of the force.

Front

What is an example of work being done?

Back

Lifting a weight off the ground is an example of work being done.

Front

What is an example of a situation where no work is done?

Back

Holding a heavy object stationary without moving it is an example where no work is done.

Front

How does the angle between force and displacement affect work done?

Back

Work done is maximized when the force is applied in the same direction as the displacement. If the angle is 90 degrees, no work is done.

Front

What is the work done when a force is applied at an angle?

Back

When a force is applied at an angle, the work done is calculated using W = F × d × cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is the significance of the direction of force in calculating work?

Back

The direction of the force is crucial because only the component of the force that acts in the direction of the displacement contributes to the work done.

Front

What is the work-energy principle?

Back

The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.