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ElenaW [278]
3 years ago
8

A person stands on a scale in an elevator. his apparent weight will be the greatest when the elevator:

Physics
2 answers:
valentina_108 [34]3 years ago
8 0
... when the elevator doors close and the car STARTS moving upward.
Lubov Fominskaja [6]3 years ago
3 0
Hello! The correct answer is: His apparent weight will be greatest when the elevator is accelerating upwards.



I really hope this helped you! c:
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A car increases velocity from 30 m/s to 60 m/s in 4 seconds. Calculate the average acceleration of the car over this time.
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Answer:

B.7.5m/s2

Explanation:

average acceleration=change invelocity/time taken

a=(60-30)/4

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3 years ago
Followed by the previous question: presume that the electron performs a uniform circular motion around the hydrogen nucleus. Wha
Ksivusya [100]

Answer:

A_c=87.73*10^{21}m/s

Explanation:

From the question we are told that

r=5\times 10^{-11}

T=1.5 \times 10^{-16}

Generally the equation for velocity is mathematically given as

Velocity (v)=\frac{2 \pi r}{t}

V=\frac{2 \pi (5*10^{-11})}{1.5*10^{-16}}

V=\frac{2 \pi (5*10^{-11})}{1.5*10^{-16}}

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A_c=\frac{V^2}{r}

A_c=(\frac{20.944*10^5)}{r5*10^{-11}}

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2 years ago
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An object of mass 0.40 kg, hanging from a spring with a spring constant of 8.0 N/m, is set into an up-and-down simple harmonic m
Sergeeva-Olga [200]

Answer:

a = 2 m/s2

Explanation:

we know from newtons 2nd law

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we also know that from hookes law we have

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3 years ago
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