Definitions
Work is the transfer of this.
What is energy?
The SI unit for work.
What is Joules?
Chris Pine pushes the star ship Enterprise 2 meters, using a constant force of 5N. Chris does this much work on the Enterprise.
What is 10 Joules?
Steve does 10 Joules of work to lift a large rock. He works lifting the rock for 5 seconds. He uses this much power on the rock.
What is 2 Watts?
P
what is the symbol of Power?
The rate at which work is done.
What is power?
Equation for Work
What is W=Fd or Work = force X distance
Mr. Holecek applies a constant force of 50 N to push a desk 8 m across a room. He does this much work.
What is 400 Joules?
Max does 75 J of work in 5.0 seconds to push a computer terminal off a cliff. He uses this much power on the terminal. (This is before it falls and smashes to bits).
What is 15 Watts?
Hp
what is the symbol for Horsepower?
The tool used to measure electric power
What is a wattmeter?
Types of work
What positive, negative, and zero work?
Leann applies a force to lift a .5kg book on her desk. She moves the book .5 meters. Leann does this much work.
What is 2 J ?
A student pushes her car across the parking lot using 40 Watts of power in 90 seconds. The student does this much work.
What is 4000 Joules?
standard unit of power.
What is a Watt?
ratio of the useful work done by the system
What is efficiency?
kg *______ = N
What is gravity (9.8 m/s/s)?
A panda does 25 Joules worth of work at a constant force of 5 N. in order to move a bamboo shoot. The shoot moved this far.
What is 5 meters?
Simon drags a suitcase across the floor using 81 Watts of power to do 90 Joules of work. He works for this long.
What is 1 seconds?
Power and Work are ___________ quantities.
What is scalar?
The net work done by the forces on an object equals the change in kinetic energy.
What is the work-energy theorem?
W=F*d*Cos(Theta)
What is work at an angle
An elf does 100 J of work lifting a pumpkin 2m up a ramp that is inclined 20 degrees from the horizontal. What is the force applied ?
What is 50 N ?
If 68 Watts of power is produced in 18 seconds. How much work is being done?
What is 1200 J of work?
Larger unit for power
What is a horsepower?