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3 years ago

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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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Read 2 more answers

In her hand, a softball pitcher swings a ball of mass 0.245 kg around a vertical circular path of radius 59.8 cm before releasin

GuDViN [60]

Answer:

The velocity is $v_b = 20.17 \ m/s$

Explanation:

From the question we are told that

The mass of the ball is $m = 0.245 \ kg$

The radius is $r = 59.8 \ cm = 0.598 \ m$

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

$d = \pi * r$

$W = 30.9 * 0.598$

$W = 18.48 \ J$

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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