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3 years ago

6

If this is the stationary wall isn’t the ANSWER that there is no work being done? If not what is the correct answer and why? Hel

p!!

1 answer:

irakobra [83]3 years ago

8 0

Answer:

no work is done cause there is no movement of the wall

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4 years ago

A horizontal force of 140 N is needed to pull a 60kg box across the horizontal floor at constant speed . Find the coefficient of

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Explanation:

formula for force is:

force=mass × acceleration

but in case of friction

force =coefficient of friction × Normal Reaction

F. = u × R

U = F/R

but when placed horizontally

R= M×G

M=mass=60kg

G=Gravity(10m/s or 9.8m/s)

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U=140/60×10

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1 year ago

If 12V battery maintains a 4.5A current through a resistor what is the resistance of the resistor?

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Answer:

2.7ohms

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V is the voltage

I is the current

R is the resistance

So;

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3 years ago

Which of these is an example of a mechanical wave? A. the light of the Sun B. a car stuck in traffic C. the shaking from an eart

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3 years ago

The position vector of a particle of mass 1.70 kg as a function of time is given by r with arrow = (6.00 î + 5.70 t ĵ), where r

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Answer:

The angular momentum of the particle is 58.14 kg m²/s along positive z- axis and is independent of time .

Explanation:

Given that,

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The velocity is the rate of change of the position of the particle.

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$L=r\cdot p$

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Put the value of p into the formula

$L=m(r\times v)$

Substitute the value into the formula

$L=1.70(6.00\hat{i}+5.70 t \hat{j}\times5.70\hat{j})$

$L=1.70\times34.2$

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Hence, The angular momentum of the particle is 58.14 kg m²/s along positive z- axis and is independent of time .

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3 years ago