Work and Power
What is the formula for power?
P = W/t
Mechanical advantage of a 10 m ramp that is 2 m tall.
What is 5?
Energy of motion is called this
What is kinetic energy?
The pivot point of a lever is called this.
What is the fulcrum?
The ratio of useful output work to input work.
What is efficiency?
John does 3,960 J of work in 60 s. What is his power?
66 W
Mechanical advantage of a 6 m ramp that is 1.5 m tall
What is 4?
Energy stored due to position is called this.
What is potential energy?
A wheelbarrow is this type of lever.
What is a second-class lever?
A system that exchanges matter and energy with surroundings.
What is an open system?
Work is measured in this unit.
What is Joules (J)?
Mechanical advantage is calculated using this ratio.
What is output force ÷ input force?
A 0.02 kg bullet moving at 300 m/s has this kinetic energy.
What is 900 J?
Tweezers are this type of machine.
What is a third-class lever (compound of two)?
All levers have this rigid bar.
What is an arm?
A crane uses 5,200 N to lift something 25 m. Find the work.
What is 130,000 J?
A ramp increases this while decreasing force.
What is distance?
At the top of its arc, a thrown ball has this amount of potential energy.
What is maximum?
A screw is defined as this.
What is an inclined plane wrapped around a cylinder?
This is another unit equivalent to a joule.
What is N·m?
Power is defined as this.
What is the rate at which work is done?
This type of machine includes ramps and stairs.
What is an inclined plane?
As a penny falls, this energy conversion occurs.
What is potential → kinetic?
This lever has the fulcrum in the middle.
What is a first-class lever?
This describes how quickly energy is transferred.
What is power?