Work
This is the formula used for work
What is w=f*d
This is the formula for power
What is P=w/t
There are this many kinds of simple machines
What are 6
The formula for Kinetic energy
What is KE = .5mv2
This is known as stored energy
What is potential energy
This is the unit for work
What is joules
This is the unit for power
What is the watt
Gears are a type of this simple machine
What are wheels and axles
An objects resistance to change in also referred to as
What is inertia
This is the unit for energy
What is joules
Is it work if you are lifting a bag to put in a different room
No
Another engine reaches its top speed from rest in 7.5 s. It is able to perform 250,000 J of work in that time. How much power does this engine have in that time?
What is 33,333.3 W
Stairs are this type of simple machine
What is an inclined plane
The ratio or percentage of work output divided by work input times 100
What is efficiency
Calculate the Ek of a car which has a mass of 1000 kg and is moving at the rate of 20 m/s.
What is 200,000J
If a man pushes a concrete block 10 meters with a force of 20 N, how much work has he done?
What is 200 J
An 190,000 W engine can accelerate from rest to a top speed in 9 s. How much work did the engine do?
What is 1,710,000 J
A knife is this type of simple machine
What is a wedge
What is the wheel is the larger wheel, while the axle is the smaller wheel
A 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground) What is the potential energy of the refrigerator?
What is 220,500J
A crate is being lifting into a truck. If it is moved with a 2470N and using 3650 J is done, then how far is the crate being lifted?
What is 15m
This is how many watts there are in one horsepower
What are 746 watts
The pivot point of a lever
What is a fulcrum
two or more simple machines used together to increase the machines ability to work
What is compound machine
Missy Diwater, the former platform diver for the Ringling Brother's Circus had a kinetic energy of 15,000 J just prior to hitting the bucket of water. If Missy's mass is 50 kg, then what is her speed?
What is 77.56 m/s