Question

The kinetic energy of an object depends on which of the following?


A.


the object’s mass and direction


B.


the object’s speed and mass


C.


the object’s work and direction


D.


the object’s speed and work

Answer 1

@iGreen @JackofallTradez

Answer 2

Do you have any ideas?

Answer 3

just please help me

Answer 4

But I need to know if you have any ideas on the topic. I need to know what I'm working with.

Answer 5

It would be B

Answer 6

Because kinetic energy relies on the object's velocity (speed) and mass

Answer 7

In the following situations, which one does not have kinetic energy?


A.


a baseball in a catcher’s glove


B.
a lady walking slowly across the street


C.
a hockey puck sliding on the ice


D.
a man running around a track

Answer 8

A, because the object isn't moving

Answer 9

All of the following objects are moving at the same speed. Which one has the greatest kinetic energy?


A.
a bicycle


B.
a motorcycle


C.
a car


D.
a semi tractor-trailer truck

Answer 10

It would be D, because it has the most mass

Answer 11

What is the kinetic energy of a 1.0-kg billiard ball that moves at 5.0 m/s?


A.
5.0 J


B.
6.5 J


C.
10.0 J


D.
12.5 J

Answer 12

I would believe it is A, because K = Vm

Answer 13

A ball is thrown straight up in the air. When will its kinetic energy be the least before it is caught?


A.
at the start of its flight


B.
halfway to the top of its flight


C.
at the end of its flight


D.
at the top of its flight

Answer 14

@JackofallTradez

Answer 15

D, because it has reached its peak

Answer 16

Which property of potential energy distinguishes it from kinetic energy?


A.
mass


B.


position


C.
force


D.
work and power

Answer 17

B

Answer 18

Its position is stationary

Answer 19

What kind of energy does a rubber band have when it is stretched?


A.
elastic potential energy


B.
gravitational potential energy


C.
kinetic energy


D.
chemical energy

Answer 20

It would be A. Once it's released, the energy is released as well

Answer 21

@JackofallTradez

Answer 22

I would go with D
The man uses a boulder as a folcrum.

Answer 23

If a simple machine reduces the strength of a force, what must be increased?


A.
the distance that the force moves


B.
the work the simple machine performs


C.
the speed of the input force


D.
the size of the simple machine

Answer 24

I would have to go with B

Answer 25

the 1 about fulcrum was b c and d

Answer 26

just a few more

Answer 27

OK, but it needs to be quick, please

Answer 28

and the last one was a

Answer 29

Which of the following statements describes a compound machine?


A.
It has movement in only one direction.


B.
It can only be acted on by one force.


C.
It is made up of more than one simple machine.


D.
It makes work more difficult.

Answer 30

I believe the best answer is C

Answer 31

hey your back! YaY

Answer 32

Yep ^_^

Answer 33

just fyi im not leaving the question my wifi keeps timing out so it looks like im gone

Answer 34

but im not

Answer 35

KK

Answer 36

It would be B, the two handles are the two levers, and the two blades are the two wedges.

Answer 37

i think its a

Answer 38

Well, it takes more force to crack open the larger nut. And they put it farther away from the pivot point than the smaller nut.

Answer 39

so c

Answer 40

I would have to go with B, because it's comparing cracking the larger nut to cracking the smaller nut. Comparing the change from larger to smaller.

Answer 41

but wouldnt you need more fprce to crack the bigger nut

Answer 42

@JackofallTradez

Answer 43

You do need more force to crack the bigger nut. But the question is asking you to compare the change from cracking the bigger nut to cracking the smaller nut, so it would be B

Answer 44

a ramp is a simple machine right

Answer 45

Yep

Answer 46

what is a compound machine

Answer 47

A machine that has two or more simple machines involved.

Answer 48

What do you think?

Answer 49

idk my brain is starting to hurt again...

Answer 50

one se my doctor has to give me some medicine

Answer 51

ok im all good now

Answer 52

what do u think it is

Answer 53

I think it is B. You have the crank, which rotates the gear, and turns the the drill.

Answer 54

you see a screw and the end, 1, and the wheel, which is 2. so must be compound

Answer 55

maybe there's more but im bad at identifying those

Answer 56

but it is a compound

Answer 57

It is a compound machine

Answer 58

thx

Answer 59

can u help me with more?

Answer 60

What type of machine is a rake?





A.
simple machine


B.
compound machine

Answer 61

I would have to go with A

Answer 62

what kind of machine is a rake anyway

Answer 63

I'm not sure if there is a specific kind for it. I know it scoops the material into its tongs.

Answer 64

i think it would be a lever, the spot where you would hold acts as the fulcrum

Answer 65

And you use it to collect material at the focal point and move it

Answer 66

so a or b

Answer 67

It would be a

Answer 68

what do u think @bethesda

Answer 69

a simple machine

Answer 70

A seesaw uses a level and a fulcrum to work. So it would be a compound machine

Answer 71

lever*

Answer 72

The wire cutters uses two wedges and two levers, like the scissors. So it's a compound machine

Answer 73

Definitely a compound machine. No doubt about it

Answer 74

Screw and lever

Answer 75

so compound

Answer 76

Well, in this question, you identify two simple machines found in this compound machine

Answer 77

oh yeah was just wondering

Answer 78

No worries ^_^

Answer 79

just a random question... r u good at language arts

Answer 80

@JackofallTradez

Answer 81

Pretty decent

Answer 82

will u be on here tomorrow night

Answer 83

Maybe

Answer 84

I will be on tomorrow morning and afternoon