Lesson 3 Potential Energy & Kinetic Energy Flashcards
In physics is an abstract idea that is related to energy everything we do that requires us to move and exert energy.
Work
It is the one that we need to be able to do work
Energy
The work and energy has the SI unit ___
A.Pound
B.Celcius
C.Ampere
D.Second
E.Joule
E.
Refers to the energy stored in an object or substance which is based on its position arrangement or state.
Potential Energy
You need one joule of energy per 1 joule of work
True
The ability or capacity to do work.
Energy
What is the formula of force in potential energy.
F=Weight=mg(mass times the value of gravity)
___ is done only if the force makes the object move in the same direction as it is exerted.
Work
What’s the formula of work and potential energy
W=Fd (force multiplied by displacement)
The formula for finding potential energy
PE= mgh( mass times acceleration due to gravity times height)
Jenny lifted a book with a mass of 1.5 kg at 0.9 m above the floor. What is the potential energy gained by the book.
PE=mgh
PE=1.5•9.8m/s²•0.9m
PE=13.23 kg m²/s²
PE=13.23J
If the object is moving upward is PE greater than KE.
A.Yes,Because when object falls it’s gaining PE.
B.No, Because when object falls it’s gaining KE
C.KE and PE will get the same energy when an object is falling down
D.Neither of them
E.The velocity will double both PE and KE.
A
What has the greatest influence on the amount of kinetic energy have a car while traveling on a highway.
A.Mass
B.Displacement
C.Acceleratiom
D.Velocity
E.Work
D
What is the most quantities or factors that affect kinetic energy.
A.Mass and Displacement
B.Velocity and Mass
C.Work and Mass
D.Mass and Work
E.Mass and Velocity
E.
PE is affected by the ___ and ___ of an object with respect to the ground.
A.Mass and Velocity
B.Mass and Location
C.Location and Velocity
D.Work and Mass
E.Work,Mass, and Location
B
Which of the following does not affect the amount of potential energy.
A.Mass
B.Velocity
C.Acceleration
D.Displacement
E.Second
C
In KE, if an object’s velocity is doubled it increases four times.
A. No, it decreases four times
B.No, it only increases two times
C.Yes
D.It doesn’t do anything/All of the above
E.None of the above
C.
The energy of an object in motion.
Kinetic Energy
Kinetic energy comes from the word _____ which means “moving”
Kinetikos
KE can be computed using the formula ____.
KE=½mv²
What is the unit used in measuring kinetic energy.
A.Second
B.Work
C.Newton
D.Joule
E.Slug
D.
KE
When mass is doubled; velocity is constant=____
When mass is constant;velocity is doubled=_____
1.KE is doubled
2.KE is increased four times
Two trucks with masses of 5,000 kg and 10,000 kg travel at the same velocity of 3m/s. Find the kinetic energy of each truck
Truck 1=22,500kg m²/s² or 22,500 J
Truck 2=45,000kg m²/s² or 45,000 J
The following situations demonstrate potential energy EXCEPT:
A. a rolling stone at seashore
B. A child at the top of the slide
C. A car park at the top of a hill
D. River water at the top of a waterfall
A
