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Elina [12.6K]
3 years ago
6

A model train traveling at a constant speed around a circular track has a constant velocity

Physics
1 answer:
TiliK225 [7]3 years ago
3 0
A model train traveling at a constant speed around a circular track has a constant velocity. FALSE.
Hope this helps you!

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marshall27 [118]

Answer:

C)the right cord pulls on the pulley with greater force than the left cord

Explanation:

As we can see the figure that B is connected to the right string while A is connected to the left string

Now force equation for B as it will move downwards is given as

(2m)g - T_B = (2m)a

similarly for block A which will move upwards we can write the equation as

T_A - mg = ma

now we know that pulley is also rotating so the tangential acceleration of the rope at the contact point with pulley must be same as that of acceleration of the blocks

so here pulley will rotate clockwise direction

So tension in the right string must be more than the left string

So correct answer will be

C)the right cord pulls on the pulley with greater force than the left cord

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Answer:

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Explanation:

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3 years ago
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A 1.0 kg copper rod rests on two horizontal rails 1.0 m apart and carries a current of 50 A from one rail to the other.
vagabundo [1.1K]

Answer

given,

mass of copper rod = 1 kg

horizontal rails = 1 m

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magnetic force acting on a current carrying wire is

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Rod is not necessarily vertical

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the normal reaction N = mg-F y

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horizontal acceleration is zero

F_x-f = 0

iLBd = \mu_s(mg-F_y )

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 B_d = B cosθ

iLB cosθ= μ_s (mg- iLB sinθ)

B = \dfrac{\mu_smg}{i(cos\theta +\mu_s sin\theta)}

\theta =tan{-1}{\mu_s}

\theta =tan{-1}{0.6}

\theta = 31^0

B = \dfrac{0.6\times 1 \times 9.8}{50(cos31^0 +0.6 sin31^0)}

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4 0
3 years ago
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