Lesson 3 Potential Energy & Kinetic Energy

Question 1

In physics is an abstract idea that is related to energy everything we do that requires us to move and exert energy.

Answer 1

Work

Question 2

It is the one that we need to be able to do work

Answer 2

Energy

Question 3

The work and energy has the SI unit ___
A.Pound
B.Celcius
C.Ampere
D.Second
E.Joule

Answer 3

E.

Question 4

Refers to the energy stored in an object or substance which is based on its position arrangement or state.

Answer 4

Potential Energy

Question 5

You need one joule of energy per 1 joule of work

Answer 5

True

Question 6

The ability or capacity to do work.

Answer 6

Energy

Question 7

What is the formula of force in potential energy.

Answer 7

F=Weight=mg(mass times the value of gravity)

Question 8

___ is done only if the force makes the object move in the same direction as it is exerted.

Answer 8

Work

Question 9

What’s the formula of work and potential energy

Answer 9

W=Fd (force multiplied by displacement)

Question 10

The formula for finding potential energy

Answer 10

PE= mgh( mass times acceleration due to gravity times height)

Question 11

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.

Answer 11

PE=mgh
PE=1.5•9.8m/s²•0.9m
PE=13.23 kg m²/s²
PE=13.23J

Question 12

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.

Answer 12

A

Question 13

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

Answer 13

D

Question 14

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

Answer 14

E.

Question 15

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

Answer 15

B

Question 16

Which of the following does not affect the amount of potential energy.
A.Mass
B.Velocity
C.Acceleration
D.Displacement
E.Second

Answer 16

C

Question 17

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

Answer 17

C.

Question 18

The energy of an object in motion.

Answer 18

Kinetic Energy

Question 19

Kinetic energy comes from the word _____ which means “moving”

Answer 19

Kinetikos

Question 20

KE can be computed using the formula ____.

Answer 20

KE=½mv²

Question 21

What is the unit used in measuring kinetic energy.
A.Second
B.Work
C.Newton
D.Joule
E.Slug

Answer 21

D.

Question 22

KE
When mass is doubled; velocity is constant=____
When mass is constant;velocity is doubled=_____

Answer 22

1.KE is doubled
2.KE is increased four times

Question 23

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

Answer 23

Truck 1=22,500kg m²/s² or 22,500 J
Truck 2=45,000kg m²/s² or 45,000 J

Question 24

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

Answer 24

A

Question 25

Na potential energy is the energy an object has due to its ___.
A. Acceleration
B. Motion
C. Velocity
D. Mass
E. Position

Answer 25

E

Question 26

The following conditions exhibits kinetic energy EXCEPT:
A. Water inside a glass
B. Rolling stone from the hill
C. Running athletes on the field
D. Dancing kids in the living room of the house.

Answer 26

A

Question 27

Which of the following quantities when doubled has the greatest effect on the amount of kinetic energy.
A. Mass
B. Location
C. Position
D. Size
E. Velocity

Answer 27

E.

Question 28

If green ball is higher from the ground than a yellow ball, both have the same mass which ball has more potential energy.
A. Green ball
B. Yellow ball
C. Both have the same KE
D. Both have the same PE
E. Both have the same PE and KE

Answer 28

A