Question

A car moving with a velocity of 20 meters/second has
1.8 * 105 joules of kinetic energy. What is the mass of the car?

Answer 1

u knw KE=1/2mv^2
u knw KE=1.8 * 105
v=20
so juts put the values in formula u ll get the mass

Answer 2

well i just need the answerws because todays my last day for me to make it up and if not i have to go to summer skool and ima be behind

Answer 3

u ll get 0.47kg

Answer 4

A. 4.6X10^2
B. 9.0X10^2
C. 1.0 X10^3
D. 1.2X10^3

Answer 5

IS IT A , B , C OR D, CAUSE I HAVE TO MAKE A 80% IN THE CLASS SO I CAN TAKE MY TEST

Answer 6

CAUSE RIGHT NOW I HAVE A 54%

Answer 7

itss A

Answer 8

ITS WRONG:/

Answer 9

np i ll help u :) u only need ans right no solution

Answer 10

OK WELL NEXT QUESTION I HAVE TO MISS 4 OUT OF 5 AND YES THANK YOU

Answer 11

:)

Answer 12

WAIT HOLD ON IMA GUESS AND REDO IT WITH YOUR HELP

Answer 13

orry its 2 my mitake ans will be second as mas is 0.94 kg means u can do aprox 9.6 x 10^2

Answer 14

yea dat will be better :)

Answer 15

DONT WORRY ILL RETAKE IT LOL

Answer 16

THIS IS ON KINETIC AND POTENTIAL ENERGY THIS IS THE WEBSITE CALLEDE PLE WHICH IS PLATO

Answer 17

A stone of mass 0.55 kilograms is released and falls to the ground. Measurements show that the stone has a kinetic energy of 9.8 joules at the point of impact with the ground. What is the stone's velocity when it hits the ground?

Answer 18

ue kinetic energy fomula
Ke=mv^2/2

Answer 19

A. 6.3 METERS / SECOND
B . 7.2 M/S
C. 8.1 M/S
D. 9.3 M/S

Answer 20

A , B , C OR D

Answer 21

i m gettin 5.9 so by approx the ans will be A

Answer 22

OK LETS CHECK

Answer 23

ITS CORRECT LOL:)
NEXT QUESTION

Answer 24

Jim has a mass of 15 kilograms and is
running on the ground with a velocity of 2.7 meters/second. What is Jim's kinetic energy?

A. 68 JOULES
B . 55J
C. 27 J
D . 29J

Answer 25

54.675 joules so aprox 55 go for B

Answer 26

KAY:)

Answer 27

CORRECT:) NEXT YOUR SO HELPFUL:)

Answer 28

Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kinetic energy?

A . 1.7 X10^2 JOULES
B. 1.5XX10^2
C. 2.0X10^2
D. 2.2X10^2

Answer 29

its A as ans is 173.4

Answer 30

THANKS:) NEXT QUESTION

Answer 31

ok

Answer 32

An object with a massof 100 grams (0.100 kg) is dropped from a certain height and has a velocity of 60 meters/second. If the potential energy of this object is 179.99 joules, how high was the object when it was dropped?

Answer 33

A. 9.2X10^1 , B . 1.8X10^2 , C. 9.8 X10^2 , D. 1.0 X10^2 METERS

Answer 34

@yash2651995 y dont u try this one?

Answer 35

i ll go wtih D

Answer 36

but not sure :(

Answer 37

I GOT IT WRONG BUT THIS IS THE LAST ONE

Answer 38

Anne releases a stone from a height of 2 meters. She measures the kinetic energy of the stone at 9.8 joules at the exact point it hits the ground. What is the mass of the stone?

Answer 39

A .0.5 KILOGRAMS , B. 0.6 KILOGRAMS , C. 0.4 KILOGRAMS D. 0.9 KILOGRAMS

Answer 40

0.5 Kgs? options?

Answer 41

IM TRYNA GET THIS DONE BECAUSE CHEMISTRY IS HARD AND I A BE A JUNIOUR NEXT YEAR AND I DONT WANNA BE RECLASSFIED AGAIN:(

Answer 42

yea it ll be 0.5 means A

Answer 43

I HAVE TILL 9:00 TO GET AN 80%

Answer 44

hmm u have a time den post ur qn we are here

Answer 45

OK..:) CAUSE I WANNA GRADUATE SO I CAN MAKE MY MOM HAPPY

Answer 46

yea sure np post ur qn

Answer 47

A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second?

Answer 48

A. 5.1 , B. 9.8 , C . 25 , D. 15 METERS

Answer 49

A

Answer 50

I JUST NEED THE ANSWERS CUZ AFTER THIS I HAVE TO TAKE MY 5TH PERIOD FINAL EXAM AND I WONT HAVE TIME

Answer 51

OK

Answer 52

IT WAS WRONG BUT NEXT QUESTION

Answer 53

A truck accelerating at 0.0083 meters/secondÆ covers a distance of 5.8 × 10Ê meters. If the truck's mass is 7,000 kilograms, what is the work done to reach this distance?

Answer 54

hmm .. ok

Answer 55

but ans is 15 m

Answer 56

A. 1.7X10^6 B. 3.4X10 ^6 C. 5.6X10^6 D. 6.8X10^6

Answer 57

B

Answer 58

A ball having a mass of 500 grams is dropped from a height of
9.00 meters. What is its kinetic energy when it hits the ground?

Answer 59

A . 4.4X10^3 . B. 441J C. 44.1J D. 4.41JOULES

Answer 60

THE ANSWER WAS RIGHT BTW

Answer 61

it C

Answer 62

Jake drops a book out of a window from a height of 10 meters. At what velocity does the book hit the ground?

Answer 63

A. 7.0 M/S
B. 10 M/S
C. 14 M/S
D. 28 M/S

Answer 64

MY TEACHER LEAVES AT 11:30 AND THATS IT I CANT TEST NO MORE I HAVE TO TEST SO I CAN GET MY CREDIT FOR MY CLASS

Answer 65

c

Answer 66

What form of energy transforms to what other form when you turn on a steam iron?

Answer 67

yea its C

Answer 68

electrical to heat energy

Answer 69

agree with yash

Answer 70

A. ELCTRICAL TO POTENTIAL
B . ELECTRICAL TO KINETIC
C. ELCTRICAL TO CHEMICAL
D. ELECTRICAL TO THERMAL

Answer 71

d

Answer 72

D as always remeber thermal is related with heat

Answer 73

*remember

Answer 74

OK THANKYOU NEXT QUESTION HOLD ON:)

Answer 75

THIS IS PERODIC MOTION NOW

Answer 76

mje nend a rhi h m ja rhi hu yash take care of her :P bye guys

Answer 77

@leonice17 yash will help u further nw i m leaving bye

Answer 78

OK:)

Answer 79

What is the main difference between the formulas for kinetic energy (KE) and gravitational potential energy (PE)?

Answer 80

(mv^2)/2 and mgh
one related to speed and one related to height

Answer 81

a. KE DEPENDS ON POSTION AND PE DEPENDS ON MOTION
B. KE DEPENDS ON MOTION AND PE DEPENDS ON POSTION
C. BOTH ENERGIES DEPEND ON MOTION , BUT ONLY KE DEPENDS ON POSTION
D. BOTH ENERGIES DEPENDS ON POSTION , BUT ONLY PE DEPENDS ON MOTION

Answer 82

A, B , C OR D

Answer 83

b

Answer 84

What is the difference between the energy of spring A, stretched 0.6 meters, and spring B, stretched 0.3 meters, if they have the same spring constant?

Answer 85

options??

Answer 86

A. SPRING A HAS MORE POTENTIAL THEN SPRING B
B. SPRING A HAS LESS POTENTIAL ENERGY THAN SPRING B
C. SPRING A AND B HAVE THE SAME POTENTIAL ENERGY
D. SPRING A AND B HAVE THE SAME KINETIC ENERGY

Answer 87

A, B , C OR D

Answer 88

a

Answer 89

Which is true about the total mechanical energy of a pendulum in the absence of friction?

Answer 90

it remains constant

Answer 91

A. IT IS CONSERVED WHEN PE=KE
B. IT IS CONSERVED WHEN PE>KE
C. IT IS CONSERVED WHEN PE < KE
D. IT IS CONSERVED FOR ALL OF THE POSITONS IN THE PENDULUM

Answer 92

SO IT IS A.?

Answer 93

d conserved always

Answer 94

When is the restoring force of a spring equal to zero?

Answer 95

uncompressed state or at natural length

Answer 96

or unstreched all are same thing

Answer 97

A. AT THE STRECHED POSITION
B. AT THE MINUMIM DISPLACEMENT
C. AT THE EQULIBRIUM POSITON
D. AT THE COMPRESSION POSTION

Answer 98

A?