Work and Power Problems

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

How much work is done when a 10 N force moves an object 5 m?

Back

50 J

Front

What is the unit of work in the International System of Units (SI)?

Back

Joule (J)

Front

If a force is applied at an angle, how do you calculate the effective force doing work?

Back

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

Front

What is power in the context of work?

Back

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

Front

How much power is used if 100 J of work is done in 5 seconds?

Back

20 W

Front

What is the relationship between work and energy?

Back

Work is a transfer of energy; when work is done on an object, energy is transferred to that object.

Front

How much work is done when a 50 N force moves a block 4 m?

Back

200 J

Front

What does it mean when work is said to be done against gravity?

Back

It means that the work done is used to lift an object against the gravitational force.

Front

How much work is done when lifting a 200 N weight 3 m?

Back

600 J