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3 years ago

Which of the following are not conditions for producing work?

Physics

2 answers:

jeka943 years ago

8 0

Answer:

A and C

Explanation:

We know that

Work done,W=Fd

Where F=Applied force

d=Displacement of object

Momentum, p= mv

It is not necessary that momentum must be greater than force .If momentum is less than force then the work can be produced because work depend upon displacement and applied force.

$W=Fdcos\theta$

If the value of theta is not equal to zero the work can be produced if theta is equal to 30 ,45 or 60 degree.

Therefore, it is not necessary that atleast part of the applies force must act along the same line object moves.

If force is greater than weight then, the work can be produced .

If force is less than the weight then, the work cannot be produced .

Hence, the force must be very large.

TEA [102]3 years ago

6 0

Answer:D

Explanation:

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77julia77 [94]

Answer:

The time constant is 1.049.

Explanation:

Given that,

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Put the value into the formula

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$1-e^{-(\dfrac{t}{RC})}=0.65$

$e^{-(\dfrac{t}{RC})}=0.35$

$-\dfrac{t}{RC}=ln (0.35)$

$-\dfrac{t}{RC}=-1.049$

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3 years ago

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Oksana_A [137]

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zhannawk [14.2K]

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Explanation:

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3 years ago

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2 years ago