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Vlad [161]
3 years ago
7

1 2 3 4 5 6 7 8 9 10

Physics
2 answers:
alexgriva [62]3 years ago
4 0

Answer:

w and z

Explanation:

multiply the forces and distances together to solve for work

first and last ones give you 1125

Got it right on Edgenuity

Novosadov [1.4K]3 years ago
3 0

Answer:

W and Z

Explanation:

Work done is the force applied to move a body through a distance in a specific direction.

 Work done  = Force x distance

Now let's use this formula to solve for work done;

Scenario W: A force of 75 N moves a box 15 m.

      Work done  = 75 x 15  = 1125J

Scenario X: A force of 100 N moves a box 12 m.

       Work done  = 100 x 12   = 1200J

Scenario Y: A force of 50 N moves a box 20 m.

      Work done  = 50 x 20  = 1000J

Scenario Z: A force of 25 N moves a box 45 m.

      Work done  = 25  x 45  = 1125J

Choices W and Z is the right option in which the same amount of work is done on the box.

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Answer:

The velocity is v_b = 20.17 \ m/s

Explanation:

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   The mass of the ball is  m = 0.245 \ kg

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   The force is  F =  30.9 \ N

   The speed of the ball is  v = 16.0 \ m/s.

Generally the kinetic energy at the top of the circle is mathematically represented as

    K_t  =  \frac{1}{2} *  m  *  v^2

=> K_t  =  \frac{1}{2} *  0.245   *  16.0 ^2  

=> K_t  =  31.36 \ J  

Generally the work done by the force applied on the ball from the top to the bottom  is mathematically represented as

       W =  F *  d

Here  d is the length of  a semi - circular arc which is mathematically represented as

       d =  \pi * r

So

      W =  30.9 *  0.598

      W = 18.48 \ J

Generally the kinetic energy at the bottom is mathematically represented as

      K_b  =  \frac{1}{2} *  m *  v_b^2

=>    K_b  =  \frac{1}{2} *  0.245  *  v_b^2

=>   K_b  =  0.1225  *  v_b^2

From the law of energy conservation

     K_t +  W  =K_b

=>    31.36+  18.48 = 0.1225  *  v_b^2

=>    v_b = 20.17 \ m/s

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