Work and Power
The SI units for work and power
What is a Joule and a Watt?
The amount of work done to lift a 2 N book 5 m.
What is 10 J
A machine can make work easier by __________________ the force applied to an object.
What is increasing?
An ax is this type of simple machine
What is a wedge
Convert half an hour to seconds
What is 1800?
In order for work to be done, these two conditions must happen
1. Object must move due to force
2. Must move in the direction that force is applied
The distance a rock was lifted if a 150 N force was applied, with 300 J of work done.
What is 2 m
The force applied to the machine.
What is the input force?
A rake is this type of simple machine.
What is a lever?
How many horsepower is 4476 watts?
What is 6 hp?
P = W/t or P = (Fxd)/t
It is the power of a blender that can perform 4,125 J of work in 22 s.
What is 187.5 Watts?
True or false. When you use a ramp you do more work than if you lift the box straight up.
What is false?
Stairs are this type of simple machine. Egyptians would use these.
What is an inclined plane?
352,000,000 in Scientific Notation
What is 3.52 x 108 ?
The rate of work or the amount of work done in one second
What is power?
I have a 1,700 W microwave, it runs for 8 min, how much work is done.
What is 816,000 J
By doing this you can make a machine more efficient.
What is reducing friction?
A jar lid is this type of simple machine.
What is a screw?
To open a paint can your input force is 18N and the out put force is 9 N. The Mechanical advantage is
What is .5?
One Joule of work done in one second
What is a watt?
How much work is done if you push with 8,750 N of force and the tractor does not move
What is 0 J
Using an ax your downward force is changed to a ___________________ force.
What is horizontal?
Scissors are this type of simple machine.
What is a lever?
You apply a horizontal force of 10.0 N to pull a wheeled suitcase at a constant speed of 0.5 m/s across flat ground. How much power is used?
(Hint: The suitcase moves 0.5 m/s. Consider how much work the force does each second and how work is related to power.)
What is 5 W?