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vesna_86 [32]
2 years ago
9

A bolt is to be tightened with a torque of 7.0 N · m. If you have a wrench that is 0.55 m long, what is the least amount of forc

e you must exert?
Physics
1 answer:
kodGreya [7K]2 years ago
4 0

To solve this problem we will apply the given concept for torque which explains the relationship between the force applied and the distance to a given point. Mathematically this relationship is given as

\tau = F*d \rightarrow F = \frac{\tau}{d}

Where,

\tau = Torque

F = Force

d = Distance

Our values are given as,

\tau = 7.0Nm , d = 0.55m

Therefore replacing we have that the force is

F = \frac{7}{0.55}

F = 12.72N

Therefore the least amount of force that you must exert is 12.72N

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Answer:

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A crate resting on a rough horizontal floor is to be moved horizontally. The coefficient of static friction is 0.36. To start th
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Answer:

Explanation:

The direction of force will be in upward direction making an angle of θ with the vertical .

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For equilibrium

F sinθ = .36 (mg - F cosθ)

F sinθ + .36 F cosθ =.36 mg

F (sinθ + .36 cosθ) = .36 mg

F R( cosδsinθ +sinδ cosθ) = .36 mg ( Rcosδ = 1 . Rsinδ= .36 )

F R sin( θ+δ )  = . 36 mg

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For minimum F , sin( θ+δ ) should be maximum

sin( θ+ δ ) = sin 90

θ+ δ  = 90

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A small water pump is used in an irrigation system. The pump takes water in from a river at 10oC, 100 kPa at a rate of 5 kg/s. T
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Answer:

0.98kW

Explanation:

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\Delta U = Q-W

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Where

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h_2 = Specific Enthalpy (OUT)

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V_{1,2} =Velocity (In, Out)

Our values are given by,

T_i = 10\°C

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