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12345 [234]
3 years ago
13

Complete each statement about the sign of the work done on a baseball. Carlton catches a baseball and his hand moves backward as

he brings the ball to a halt, doing work on the baseball. Carlton throws a baseball, doing work on the baseball. Carlton carries a baseball in his hand as he rides his bicycle in a straight line at constant speed, doing work on the baseball. Carlton carries a baseball in his hand as he rides his bicycle in a straight line with increasing speed, doing work on the baseball.
Physics
1 answer:
dezoksy [38]3 years ago
8 0

Answer and Explanation:

  • The work done is negative as the force is applied in the forward direction and the displacement of the hand is in the backward direction.
  • The work done is positive as the work is done on the baseball by Carlton. Moreover, both the force applied and the displacement of Carlton are in a straight line in the forward direction.
  • The work done in this case is zero as Carlton rides with constant speed, the Kinetic energy too remains constant and hence net work done is zero.
  • The work done in this case is positive as the work is done on the baseball by Carlton and as the velocity changes its Kinetic energy also varies wit it.
  • Also  the force applied and the displacement of Carlton in this case are in the directed to the same path.
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Answer:

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Explanation:

given,

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W_x = \dfrac{0.543 c - (-0.741 c)}{1-\dfrac{(0.543 c)(-0.741 c)}{c^2}}

W_x = \dfrac{0.543 c +0.741 c)}{1+\dfrac{(0.543)(0.741)c^2}{c^2}}

W_x = \dfrac{1.284c}{1+0.402363}

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An airplane flies eastward and always accelerates at a constant rate. At one position along its path it has a velocity of 34.3 m
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Explanation:

We'll need two equations.

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