Work, Energy, and Power Quiz

What is mechanical work?

• When an object moves without any force

• When a force is applied but no movement occurs

• When a force moves an object over a distance

• When energy is lost in a system

In which unit is work done measured?

• Watts (W)

• Newton-metres (N m)

• Newtons (N)

• Meters (m)

If you push against a wall and it doesn't move, how much work is done?

• A small amount of work

• Maximum work

• Zero work

• Negative work

What is the relationship between work done and energy transfer?

• They are opposite quantities

• Work done is always less than energy transferred

• They are equivalent quantities

• Work done is always more than energy transferred

Which equation correctly represents work done?

• W = F + d

• W = F × d

• W = F ÷ d

• W = F - d

Power is defined as:

• Force multiplied by distance

• Energy divided by force

• Work done per unit of time

• Distance divided by time

If two cars do the same amount of work but one has more power, what's the difference?

• The more powerful car uses less energy

• The more powerful car travels a shorter distance

• The more powerful car completes the work in less time

• The more powerful car applies less force

What happens when work is done on an object?

• The object loses mass

• Energy is transferred to the object

• The object's temperature always increases

• The object's volume changes

In the equation for work done, what does 'd' represent?

• Density

• Diameter

• Direction

• Distance

What is the SI unit for power?

• Joules (J)

• Watts (W)

• Newton-metres (N m)

• Newtons (N)