Work & Energy

The standard units for work is...

• Joules
• Watts
• Newtons
• Power

The standard units for power is...

• Joules
• Watts
• Newtons
• Energy

The standard units for energy is...

• Joules
• Watts
• Newtons
• Energy

The best equation that expresses the relationship between work, force, and distance is...

• F = W / d
• F = d / W
• W = F / d

The best equation that expresses the relationship between power, time duration, and work is..

• P = Δt / W
• P = Δt / J
• P = J / Δt
• P = W / Δt

A miner has a task where a cart is pushed with a force a long a track that is a distance of x. If the distance pushed were doubled and the amount of force applied remained constant, by how much does the work increase on the cart?

• Half as before
• The same as before
• Double as before

A girl pulls a wagon with a force of F over a distance of x, producing W amount of work. To produce the same amount of work, W, but having the girl needing to apply less force, she needs to ____ distance

• increase
• decrease
• keep the same

A dog pushes a 0.5 kg bowl with 5 N of force for 1 m. How much work does the dog perform?

• 2.5 J
• 5 J
• 0.5 J

A car produces 50 000 J of work as coasted for 15 m. About how much net force did the car exert?

• 3300 N
• 3300 J
• 750 000 J
• 750 000 N

How far does a boy push a box if he produces 60 J of work and exerts 5 N of force?

• 300 m
• 300 km
• 12 m
• 12 km