Simple Machine
Does work with only one movement
What is a simple machine
You did 150 joules of work lifting a 120 newton backpack. How high did you lift the backpack?
1.25 meters
The formula for time
What is time= work/power
When using a simple machine, the output work can never be ______________then the input work
What is greater
A motor does 5,000 joules of work in 20 seconds. What is the power of the motor?
What is 250 watts
Inclined plane that moves
What is a wedge
A bulldozer does 30,000 joules of work to life a boulder a distance of 25 meters. How much did the boulder weigh? (hint: weight of an object is force in newtons)
What is 1200 N
The formula for power and units of power
What is power = work/time in watts
A rock is sitting in the Grand Canyon, 160 meters above the floor of the canyon. It is a small rock, with a mass of only 2 kilograms. What is the potential energy of the rock?
What is 3136 J
What is the unit of force, that may be applied to or by a machine.
What is Newton
A flat sloped surface
What is an inclined plane
Work occurs when a forces causes an object to move in the ___________ direction that the force is applied
What is same
A vacuum has a power rating of 200 watts. If the vacuum does 360,000 joules of work, how long was the vacuum run in minutes?
What is 30 minutes
The number of times the input force is multiplied by a machine gives this type of advantage
What is Mechanical advantage
How well a machine converts the energy it was given into work is called
What is efficiency
An inclined plane wrapped around a cylinder
What is a screw
An ant sits on the back of a mouse. The mouse carries the ant across the floor for a distance of 10 meters. How much work was done by the ant?
What is none
A tractor pulls a wagon for 2.0 KILOMETERS applying a horizontal 2,000 newton force on its hitch for 1 hour (or 3600 seconds). What is the power of the tractor?
What is 1111.11 watts
A falling rock with a mass of 14 kilograms is moving through the Earth's atmosphere at 15 m/s. How much kinetic energy does the rock have?
What is 1575 J
A pivot point on a lever is called a
What is fulcrum
Two circular objects of different sizes that rotate together
What is a wheel and axel
You decide to add up all the work you did yesterday. If you accomplished 10,000 newtons-meters of work. How much work did you do in the units of joules?
What is 10,000 joules
A machine uses 200 watts of power to move an object a distance of 15 meters in 25 seconds. Find the force needed and the work done by this machine.
What is Force= 333 newtons work= 5000 joules
In the wheel and axle, explain how to differentiate between the wheel portion and the axle portion
What is the axle is the smaller wheel, while the wheel is the larger wheel
A falling rock has total mechanical energy - what are the two types of energy that make mechanical energy
What is kinetic energy and potential energy