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4 years ago

9

Explain how your weight would change if you were on a space ship traveling to the moon

1 answer:

Oduvanchick [21]4 years ago

4 0

The farther from earth's surface you are, the less gravitational attraction there is. So you will weigh less on a space ship because you have escaped the gravitational pull of earth. When you finally reach the moon, your weight is roughly one sixth what it is on earth.

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3 years ago

A disk shaped grindstone of mass 3.0 kg and radius 8 cm is spinning at 600 rpm. After the power is shut off the frictional torqu

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$\theta=50\ revolution$

Explanation:

It is given that,

Mass of the grindstone, m = 3 kg

Radius of the grindstone, r = 8 cm = 0.08 m

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Finally it shuts off, $\omega_f=0$

Time taken, t = 10 s

Let $\alpha$ is the angular acceleration of the grindstone. Using the formula of rotational kinematics as :

$\alpha =\dfrac{\omega_f-\omega_i}{t}$

$\alpha =\dfrac{0-62.83}{10}$

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Let $\theta$ is the number of revolutions of the grindstone after the power is shut off. Now using the third equation of rotational kinematics as :

$\omega_f^2-\omega_i^2=2\alpha \theta$

$\theta=\dfrac{\omega_f^2-\omega_i^2}{2\alpha }$

$\theta=\dfrac{-62.83^2}{2\times -6.283}$

$\theta=314.15\ radian$

$\theta=49.99\ revolution$

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$\theta=50\ revolution$

So, the number of revolutions of the grindstone after the power is shut off is 50.

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3 years ago