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In which situation is no work considered to be done by a force?

A. when the angle between the force and displacement is 180°
B. when the angle between the force and displacement is 90°
C. when the angle between the force and displacement is 45°
D. when the angle between the force and displacement is 0°

Respuesta :

cheyennebaesa41

If the angle is either 0 or 180, that means that there is either negative or positive work, so A and D are not correct.

If the angle is 45, then there is still some work involved.

The only option where there is no work done by a force is B. when the angle is between the force and displacement is 90. 

Answer:

The correct answer is option B.

Explanation:

Work done is defined as product of applied force to an object and displacement that is distance covered by an object when force applied.

[tex]W=Force\times distance\times \cos\theta[/tex]

  • When [tex]\theta =0^o or 180^o[/tex]. positive or negative work will be done.
  • When [tex]\theta =45^o[/tex] s, some amount wok will be done
  • When [tex]\theta =90^o[/tex] no work will be done.

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