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bulgar [2K]
3 years ago
8

When finding net force, why must you know the directions of the forces acting on an object?

Physics
1 answer:
Mariulka [41]3 years ago
8 0
<h3>One reason we should know what the directions of the forces acting on an object is so we can know if we have to add or subtract. same = add together, opposite = subtract from each other. Also if we don't pay attention to the direction the Net force will be wont be accurate. There will be factors that will upset the calculation.So we must know the direction of the two forces because we have to know if we are adding or subtracting and if the answer is accurate. </h3>

<em>I hope this helps!.</em>

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While playing a scavenger hunt game, Anthony walks 48.0 m to the south and then walks 12.0 m to the west. What single straight-l
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This is shown below:

c^2 = 48^2 + 12^2
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Answer:

a

The speed of the quarterback backward is v_q =  0.08 \ m/s

b

Known are

 m_Q , m_B , (v_{Bx})_i  (v_{Qx})_f, (v_{Bx})_f

Unknown

   (v_{Qx})_f

Explanation:

From the question we are told that

   The mass of the quarterback is m_Q =  80 \ kg

    The mass of the ball is m_B =  0.43 \ kg

     The speed of the ball is  v_{B x}=  15 \ m/s

The law of momentum conservation can be mathematically represented as

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Now at initial both ball and quarterback are at rest and the negative sign signify that the quarterback moved backwards after throwing the ball

  So

       m_Q v_{Qx} =  m_B v_ {Bx}

=>     v_{Qx} =  \frac{m_Bv_{Bx}}{m_Q}

substituting values

        v_q =  \frac{0.43 * 15}{80}

       v_q =  0.08 \ m/s

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