Question

Why does kinetic energy increases when net work (Wnet) is positive?

Answer 1

@shamim

Answer 2

Can you help me with this please?

Answer 3

Ok ....

Answer 4

Do u know work energy theorem?

Answer 5

delta kinetic energy= Wnet

Answer 6

Work=change of kinetic energy

Answer 7

Exactly

Answer 8

w=k2-k1

Answer 9

My confusion is in the increase of kinetic energy. I explain it to you and can you think about it to see if it is correct?

Answer 10

Ya its correct

Answer 11

N i m going to explain it how?

Answer 12

Work= fnet . distance
fnet= ma
Kinetic energy = 1/2 mv^2

Answer 13

Ok go ahead

Answer 14

C my equation

Answer 15

w=k2-k1?

Answer 16

That is the same as W= delta K

Answer 17

If w=+10J
K2-k1=?

Answer 18

Well the answer is 10j

Answer 19

As we decided that delta k = W

Answer 20

If k1=0
k2=?

Answer 21

K2= 10j
but how do you know k1= 0?

Answer 22

Just let k1=0
If the object initially at rest

Answer 23

ok

Answer 24

Nd its possible

Answer 25

What do you mean by Nd?

Answer 26

And=nd

Answer 27

Ok :)

Answer 28

So kinetic energy increase frm 0 to 10J

Answer 29

Oh :D

Answer 30

When work w=+10J

Answer 31

Ok I got it. Thanks a lot. You are very good at explaining and teaching students.

Answer 32

So kinetic energy increase when work is +

Answer 33

Yeah that makes sense now. Thank you.

Answer 34

U r most welcome!!!

Answer 35

Glad to help u!!!