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2 years ago

Why is mass a better unit for measuring matter then weight

Physics

2 answers:

ivanzaharov [21]2 years ago

3 0

Answer:

your weight changes slightly when you fly in an airplane

Explanation:

Technically, because gravity is weaker the farther you are from a gravitational source, your weight changes slightly when you fly in an airplane. It would change even more if you're in space or on a planet with a different mass than Earth.

VashaNatasha [74]2 years ago

3 0

Explanation:

because gravity is weaker the farther you are from a gravitational source

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What is the main difference between velocity and speed?

Marina86 [1]

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Answer:

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Explanation:

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An object with a mass M = 250 g is at rest on a plane that makes an angle θ = 30 o above the horizontal. The coefficient of kine

liubo4ka [24]

Answer:

v = 79.2 m/s

Solution:

As per the question:

Mass of the object, m = 250 g = 0.250 kg

Angle, $\theta = 30^{\circ}$

Coefficient of kinetic friction, $\mu_{k} = 0.100$

Mass attached to the string, m = 0.200 kg

Distance, d = 30 cm = 0.03 m

Now,

The tension in the string is given by:

$Mgsin\theta + \mu_{k}Mgcos\theta + Ma = T$ (1)

Also

T = m(g + a)

Thus eqn (1) can be written as:

$Mgsin\theta + \mu_{k}Mgcos\theta + Ma = m(g - a)$

$Mgsin\theta + \mu_{k}Mgcos\theta + Ma = mg + ma$

$mg - Mgsin\theta - \mu_{k}Mgcos\theta = (M - m)a$

$a = \frac{0.2\times 9.8 - 0.250\times 9.8\times sin30^{\circ} - 0.1\times 0.250\times 9.8\times cos30^{\circ}}{0.250 - 0.200}$

$a = 10.45\ m/s^{2}$

Now, the speed is given by the third eqn of motion with initial velocity being zero:

$v^{2} = u^{2} + 2ad$

where

u = initial velocity = 0

Thus

$v = \sqrt{2ad}$

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2 years ago

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Answer:

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Explanation:

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2 years ago

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Periodic motion implies that the ride oscillates back and forth. The period is the time it takes to complete one cycle. Therefore it would be the swing.

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2 years ago