3 years ago

Two tiny spheres of mass 6.8 mg carry charges of equal magnitude

Physics

1 answer:

Mandarinka [93]3 years ago

5 0

Is this a true statement?

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

____ [38]

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)

F=140N

U=140/60×10

U=140/600

U=0.2333333333

approximately to 3 significant figures

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if i am correct rate it 5 star

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Answer:

Following are the responses to these question:

Explanation:

Since the $max^{m}$ is the current of ckt which depend on the reactance which inductor that also enables the ckt and inductor resistance $(X_L)$ for capacities

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for

$\to X_{L}=wL$

When $w \longrightarrow 2w$

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I believe the answer is A.

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