Formulas
Units
Concepts
Calculations
Miscellaneous Debris
100
Formula for Kinetic Energy
1/2 mv2
100
SI Base Units for work
Joules
100
When the applied force is perpendicular to movement OR there is no movement at all, work is...
Zero
100
Potential Energy of a Spring compressed 100.0 cm with a spring constant of 4 kg/s2
2 J
100
When using W = Fd cosΘ, the angle is between the direction of the applied force and what?
Horizontal
200
Formula for work without using F
W = mad
200
SI base units for µ
no units
200
what does x stand for in spring potential formula?
displacement of end of spring from rest position
200
An object has 40 J gravitational energy and 20 J of kinetic energy. If the object speeds up on an uneven surface so that the resulting kinetic energy is 35 J. What is the resulting potential energy?
25 J
200
Engine A produces 3x the power of engine B. If it takes engine A 30 seconds to do the work, how long does it take engine B to do the same work?
90 seconds
300
formula for spring potential
PE = 1/2kx2
300
kg m2/s3 is SI unit dimensions for what?
Power
300
power is inversely related to what?
elapsed time
300
Darth Vader who is 88 kg. Gets pushed 3.5 meters by Luke’s force on the Deathstar with 12.2 m/s2 acceleration in 2.2 seconds. Calculate the power expended on Darth Vader
1700 watts
300
Someone is dropping rocks again... if this guy is dropping a 55 g rock off a 3.0 m balcony, what is the KE after the rock falls 2.0 m?
1.1 J
400
work at an angle to horizontal
W = Fd cosΘ
400
SI unit dimensions for work?
kg m2/s2
400
if velocity is quadrupled, what happens to the KE?
times 16
400
A parent pulls a child in a wagon with constant speed. If the parent pulls with a force of 19.1 N for 11.0 m and the handle of the wagon is inclined at an angle of 22.0 degrees above the horizontal, and the frictional force is 2.33 N; how much work does the parent do on the wagon?
169 J
400
When you need me,
you throw me away.
But when you’re done with me,
you bring me back. What am I?
An anchor
500
conservation of energy formula
KEi + PEi = KEf + PEf
500
74,600 watt is how much horsepower?
100 hp
500
which color path uses the most power?
yellow
500
A player hits a 122 g baseball over the outfield fence. The ball leaves the bat with a speed of 31.5 m/s & a fan in the bleachers catches it 7.2 m above the point it was hit. Find the velocity just before the ball is caught
29.2 m/s
500
Poke your fingers in my eyes
and I will open wide my jaws.
Linen cloth, quills, or paper,
I will devour them all. What am I?
Scissors