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Murrr4er [49]
3 years ago
11

Choose the ending that best completes the following sentence: If an object is traveling with a constant velocity… A. There are n

o forces on the object. B. There is no net force on the object. C. There are no forces parallel to the direction of motion. D. There are only forces parallel to the direction of motion
Physics
1 answer:
Margarita [4]3 years ago
3 0

I think the answer is B...

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Find the value of T1 if 1 = 30°, 2 = 60°, and the weight of the object is 139.3 newtons.
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Answer:

Option A (69.56 newtons) is the appropriate solution.

Explanation:

According to the question,

On the X-axis,

⇒ T_1Cos30^{\circ}-T_2Cos60^{\circ}=0

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    T_1Cos 30^{\circ}=T_2Cos60^{\circ}

On substituting the values, we get

      T_1\times \frac{\sqrt{3} }{2}=T_2\times \frac{1}{2}

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On the Y-axis,

⇒ T_1Sin30^{\circ}+T_2Sin60^{\circ}=139.3 \ N

                        \frac{T_1}{2} +\frac{\sqrt{3} }{2} =139.2 \ N

                    T_1+\sqrt{3}T_2=139.2\times 2

From equation 1, we get

           T_1+\sqrt{3}\times \sqrt{3}T_1 =278.4 \ N

                        T_1+3T_1=278.4 \ N

                                4T_1=278.4 \ N

                                  T_1=\frac{278.4}{4}

                                       =69.6 \ N  

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