Question

plz koi bata do iss question mai aakhir krna kya hai....

Answer 1

The question is asking to find the SI unit in basic Forms... Kg, m,s,etc...
As we know, KE = (1/2)mv² = mv²/2

$KE \: = \: kg ( m{s}^{ - 1} ) \\ = \: kg \: m \: {s}^{ - 1}$

Now compare this dimensional unit with, That of Different options.
For eg:
$Option \: (a) \: KE \: = \: {m}^{2} \: {v}^{2} \: = \: {kg}^{2} {m {s}^{ - 1} }^{2} \\ = \: {kg}^{2} \: {m}^{2} \: {s}^{ - 2} \\ which \: is \: not \: equal \: to \: the \: dimension \: we \: found$

So, Thus is not the option.
Similarly check the rest.
Final answer: (b), (d)
Just check the dimension, and not any constant number.
(if you still have any doubt, feel free to comment.)
:)
Thankyou!!!

Answer 2

Answer:

The question is asking to find the SI unit in basic Forms... Kg, m,s,etc...

As we know, KE = (1/2)mv² = mv²/2

Now compare this dimensional unit with, That of Different options.

For eg:

So, Thus is not the option.

Similarly check the rest.

Final answer: (b), (d)

Just check the dimension, and not any constant number.

(if you still have any doubt, feel free to comment.)

:)

Thankyou!!!

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Explanation: