Understanding Power and Work Concepts

What is the definition of power in physics?

• The rate at which work is done

• The amount of force applied over a distance

• The energy stored in an object

• The resistance to motion

Which of the following is a unit of work?

• Newton

• Joule

• Watt

• Pascal

How is power output calculated if you know the work done and the time taken?

• Power = Work × Time

• Power = Work ÷ Time

• Power = Time ÷ Work

• Power = Work + Time

What is the formula for work?

• Work = Force × Distance

• Work = Mass × Acceleration

• Work = Power × Time

• Work = Energy ÷ Time

If a machine does 1000 Joules of work in 5 seconds, what is its power output?

• 200 Watts

• 5000 Watts

• 100 Watts

• 1000 Watts

If a force of 10 Newtons is applied to move an object 3 meters, how much work is done?

• 30 Joules

• 3 Joules

• 10 Joules

• 13 Joules

What is the SI unit of power?

• Joule

• Newton

• Watt

• Pascal

If an object gains 50 Joules of kinetic energy, how much work has been done on it?

• 50 Joules

• 0 Joules

If a light bulb uses 60 Watts of power, how much energy does it use in 1 second?

• 60 Joules

• 30 Joules

What is the relationship between work and energy?

• Work is the energy required to move an object

• Work is the energy stored in an object

• Work is the energy lost due to friction