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3 years ago

14

When visiting some countries, you may see a person balancing a load on the head. Explain why the center of mass of the load

2 answers:

Lilit [14]3 years ago

3 0

so it has a balanced center of gravity

hope fully this helps

gtnhenbr [62]3 years ago

3 0

because there is a balanced amount of gravity

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A 70.0-kg person rides in an elevator while standing on a scale. the scale reads 896 n. what is the magnitude and direction acce

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If the elevator was stationary, the scale would read exactly the weight of the person:
$W=mg=(70 km)(9.8 m/s^2)=686 N$
However, the elevator is moving with an acceleration a, so the scale reads a new value of the weight, which we call W'. Newton's second law becomes
$W' = ma'$
where a' is actually the total acceleration of the person, so it's the sum of the acceleraion of the elevator and of the gravitational acceleration: $a'=a+g$
Taking the direction of g (downward) as the positive direction, we can find the value of a:
$W' = m(a+g)$
$a= \frac{W'}{m}-g= \frac{896 N}{70 kg}-9.8 m/s^2=3 m/s^2$
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From the ground an object is vertically thrown upwards with an angle of theta.

Mashutka [201]

Answer:

u/2 √(1 + 3 cos² θ)

Explanation:

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At the maximum height, the vertical component is 0 and the horizontal component is u cos θ.

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The mean horizontal velocity is:

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v² = (u/2 sin θ)² + (u cos θ)²

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v² = u²/4 (1 − cos² θ + 4 cos² θ)

v² = u²/4 (1 + 3 cos² θ)

v = u/2 √(1 + 3 cos² θ)

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Answer:

Regeneration means that an organism regrows a lost part, so that the original function is restored.

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