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2 years ago

14

PLease help with this this is pretty hard for me i kinda get it but not fully

1 answer:

vodka [1.7K]2 years ago

5 0

Explanation:

Force = mass x acceleration

F= ma (formula)

15N = o.5kg x a

Divide both sides by o.5

a = 30 (greater acceleration)

15N = 4.5kg x a

Divide both sides by 4.5

a= 3.33 (great acceleration)

15N = 0.05kg x a

Divide both sides by 0.05

a = 300 (greatest acceleration)

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An astronaut brings a cube from the Earth to the Moon.

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Answer D. Inertial mass constant, weight decreases.

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An insulating plastic rod is charged by rubbing it with a wool cloth, and then brought to an initially neutral conducting metall

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A) is repelled by the sphere.

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A hockey puck has a momentum of 3.8 kg•m/s [E]. If its

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3 years ago

To practice Problem-Solving Strategy 27.1: Magnetic Forces. A particle with mass 1.81×10−3 kgkg and a charge of 1.22×10−8 CC has

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Answer:

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The direction is $- \r k$ i.e the negative direction of the z-axis

Explanation:

From the question we are that

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The charge on the particle is $q = 1.22*10^{-8}C$

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Substituting value

$F = 1.22*10^{-8} (( 3*10^4 ) \r j \ \ X \ \ ( 1.63 \r i + 0.980 \r j )T)$

$= 1.22 *10^{-8} ((3*10^4 * 1.63)(\r j \ \ X \ \ \r i) + (3*10^4 * 0.980) (\r j \ \ X \ \ \r j))$

$= (-5.966*10^4 N) \r k$

Note :

$i \ \ X \ \ j = k \\\\j \ \ X \ \ k = i\\\\k \ \ X \ \ i = j\\\\j \ \ X \ \ i = -k \\\\k \ \ X \ \ j = -i\\\\i \ \ X \ \ k = - j\\$

Now force is also mathematically represented as

$F = ma$

Making a the subject

$a = \frac{F}{m}$

Substituting values

$a =\frac{(-5.966*10^4) \r k}{1.81*10^{-3}}$

$= (-0.33m/s^2)\r k$

$= 0.33m/s^2 * (- \r k)$

6 0

4 years ago

Consider a uniform sphere, which has a mass of 4.80 kg and a radius of 22.0 cm. A tangential force of 11.2 N is applied to the o

Tcecarenko [31]

Answer:

The moment of inertia of this sphere is $0.0929\ kg-m^2$ .

Explanation:

It is given that,

Mass of the sphere, m = 4.8 kg

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$I=\dfrac{2}{5}mr^2$

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$I=0.0929\ kg-m^2$

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8 0

3 years ago