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Levart [38]
3 years ago
11

What's forces are acting on the compass needle to cause it to point northeast

Physics
1 answer:
USPshnik [31]3 years ago
3 0
Earth's magnetic field is the force acting on the compass needle to cause it to point northeast. 
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Atmospheric pressure is due to the weight _______
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Of the gravitational pull and other things like mass. Planet earth it,s self as you said sir.

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To identify whether the forces are balanced or not, you need to whet
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Answer:

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Explanation:

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2 years ago
A 3kg horizontal disk of radius 0.2m rotates about its center with an angular velocity of 50rad/s. The edge of the horizontal di
Lyrx [107]

Answer:

D

Explanation:

From the information given:

The angular speed for the block \omega = 50 \ rad/s

Disk radius (r) = 0.2 m

The block Initial velocity is:

v = r \omega \\ \\  v = (0.2  \times 50) \\ \\  v= 10 \ m/s

Change in the block's angular speed is:

\Delta _{\omega} = \omega - 0 \\ \\ = 50 \ rad/s

However, on the disk, moment of inertIa is:

I= mr^2 \\ \\ I = (3 \times 0.2^2) \\ \\ I = 0.12 \ kgm^2

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∴

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T = I \times (\dfrac{\Delta_{\omega}}{t}) \\ \\ = 0.12 \times (\dfrac{50}{10})  \\ \\ =0.6 \ N.m

Finally, the frictional force is calculated as:

F = \dfrac{T}r{}

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8 0
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You can enter compound units that are combinations of other units that are multiplied together. to enter the ⋅ explicitly, type
alexdok [17]

Answer:

30 N \cdot m

Explanation:

The torque applied by a force can be calculated as

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where

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In this problem, we have

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7 0
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miss Akunina [59]
The Celsius degree is the same size as the Kelvin.
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