Kinetic and Potential Ex.
What is the formula for?
Potential Energy
Kinetic Energy
PE = mgh
KE = 1/2 m v2
In the formula for the force of a spring what does k represent?
Spring Constant
________________ is the capacity for doing work
Energy
_______________ is the Rate at which work is done
Power
What's a joule? A. measures miles B.unit measured to measure energy C.energy of motion D.Energy
B
A roller coaster is at the top of the track. What kind of energy does it have? A.Potential B.Kinetic C.Joule D.X-axis
A. Potential
In the formula for the force of a spring what does x represent?
displacement- How much the spring is displaced from the original position.
________________ is the Ability to transfer Energy
Work
What is the formula for power?
Work / Time
What is work / time?
Power
Calculate the potential energy of a 5 kg object 6 m above the ground?
300 J
A Roller coaster starts with 150 J of Potential Energy at the top of the hill. How much Kinetic Energy is at the middle of the hill?
75 J
A teacher applies a force to a wall and becomes exhausted. Is work done?
No because no displacement
What is the Units Power is measured in?
Watts
__________ = Force x Displacement x cosθ
Work
Calculate the kinetic energy of a 10 kg object moving at 2 m/s
20 Joules
Which would have the greatest kinetic energy if they were all traveling down the road?
A. A car B. A tennis ball C. A semi truck D. A feather
What is C
What is the equation for work?
Work = Force x ΔX x Cosθ
1 HP (Horse Power) = How many Watts
746 Watts
What is the variable that is the same for both potential and kinetic energy needed to calculate?
What is Mass
Energy can be ________________ from one type to another.
A. Destroyed B. Transferred C. Created D. Ignored
B Transferred
What units is power measured in?
Watts
What is the cos(0)
What is the cos(90)
1
0
How many Watts in 3 Horse Power?
(1 HP = 746 Watts)
2238
The Energy stored as a result of deformation of an elastic object for example the stretching of a spring.
Elastic Potential Energy