Question

Physics question attack!! >_< please helpp

Answer 1

here are the question, i just need to understand them

Answer 2

@thushananth01

Answer 3

1. The gradient of the graph would give velocty, u see in any of the other graph, u dont find a constant gradient as it saying it reaches terminal velocty means gradient shouldbe a straight line, so there u go

Answer 4

owhhhh okaaay q 1 cleared :D

Answer 5

2. Apply law of conservation of momentum
total initial momentum = total final momentum
let velocty of X be v1 and velocty of y be v2

0 = mv1 -2mv2
mv1 = 2mv2
v1 = 2v2-----2

Kinetic energy of X = 0.5 m (2v2)^2 note that i hve substitited for v1 from eq 2
kinetic energy of y = 0.5* 2m ( v2)^2

divide x and y u get 2/1

Answer 6

E = TL/AX
make x the subject

T=EAX/L-----1

Use equation 1 for Tension in P
Tp = EAX/L---3

use eq 1 for tension Q note that A and L are different

\[T_{q} =\frac{ E \times \frac{1}{2}A \times X}{2l}\]


\[T_{q} =\frac{ E \times A \times X}{4l}------2\]

divide 3 by 2 u get the answer

Answer 7

4. For this u have to find the area under the graph which means u hve to count the number of boxes approximately tht would give the energy

Answer 8

5. let lambda = b
x = bD/a
3 * 10^-3 = 600*10^-9 *D/a----1

Make D/a the subject in equation 1

x'=bD/a
x' = 350*10^-9 * (D/a)

Answer 9

@Somy

Answer 10

im still doing 2

Answer 11

ohhhh ok

Answer 12

T_T

Answer 13

whts up

Answer 14

im still not getting it
lemme try again

Answer 15

sure :)

Answer 16

yaaaaaaay got it!!!

Answer 17

hehe good :)

Answer 18

q 3
T L A X what are they?

Answer 19

E = FL/AX youngmodulus equation

Answer 20

ohhh its FL/Ax

Answer 21

oops lol ok let me try

Answer 22

tell me one thing Tension is force right?

Answer 23

ofcourse :)

Answer 24

okay cool wait then

Answer 25

im not really getting what u r doing but i'll try like this
first step is making F as subject right?

Answer 26

if length is 2 L then extension will be 2 x right?

Answer 27

no they hve said extension is same

Answer 28

ohw wait then

Answer 29

got ittt!!!

Answer 30

yayyyXd

Answer 31

4 is that a joke? i really have to count those tiny boxes?

Answer 32

exctly i din bother to

Answer 33

then wht do i do?

Answer 34

u gotta count

Answer 35

okay i think i just ruined my KE question im confused again

Answer 36

wts wrng

Answer 37

why the hell i wrote 1/4 intead of 4/1

Answer 38

instead*

Answer 39

do it again

Answer 40

here
my q is what about mv parts? shouldn't they be cancelled?

Answer 41

yes thts right

Answer 42

oh wait i did it wrong

Answer 43

oh no wait lol i did it right
my brain is exploding

Answer 44

haha ski[ p

Answer 45

3 done

Answer 46

i mean 4 done

Answer 47

where did u bring 600*10^-9 from?

Answer 48

wavelength given

Answer 49

its not 600nm its 700nm

Answer 50

lol sorry my bad

Answer 51

oh thnx God it was mistake lol i thought it'd be something new

Answer 52

im getting ans as 1.5

Answer 53

is it corrct?

Answer 54

Nope

Answer 55

oh wait after i get my answer i should divide it by 2 because they say slit separation is doubled?

Answer 56

My working

Answer 57

waaaaaaaaaaait if Slit separation is doubled then Fringe separation will be doubled too??

Answer 58

noooo u hve to find it

Answer 59

here my working

Answer 60

my final answer is like double of original answer

Answer 61

i am getting
d/a = 3*10^-3/700*10^-9
x = 350*10^-9 * d/2a

Answer 62

oh yeha lol i forgot 2a part

Answer 63

then that means the ans i got in D/a will be multiplied by 1/2 because a is now doubled right?

Answer 64

yup

Answer 65

gotttt the answer!!!!!!!!!! thank u a looooooot like really a lot!! @thushananth01

Answer 66

hehe no probs