A force of 50 N acts on a body and the point of application of force is displaced by
10 cm in the direction (i) of force, (ii) opposite to that of the force, (iii) making an angle
60 degree with the force and (iv) making an angle 120 degree with the force. Find the work done in each case. ( given cos0 degree =1, cos60 degree = 0.5, cos120 degree = -0.5, cos180 degree= -1) Get BRAINLIEST for the CORRECT answer and REPORTED for the WRONG answer.
Answers
Step-by-step explanation:
i) of force
( work done when the body moves in the direction of the applied force)
Work done = Force × displacement
=F× s
= 50 N × 10 cm
= 1 Joule
ii) opposite to that of the force
( work done is opposite ,say a stone is thrown up it will fall down so it's motion is opposite)
Work done = Force × ( - displacement)
= F × ( - s )
= 50N × (-10 cm)
= -5 Joules
iii) making an angle 60° with the force
(the angle between the direction of force and direction of displacement is acute i.e less the 90°)
Work done = Force × displacement ×
cos60°
= 50N × 10 cm× 0.5
= 2.5 Joules
iv) making an angle 120° with the force
( the angle between the direction of force and direction of displacement is obtuse i.e more the 90°)
Work done = Force × displacement ×
cos 120°
= 50N × 10 cm × ( 0.5)
= - 2.5 Joules
Answer:
i) of force
( work done when the body moves in the direction of the applied force)
Work done = Force × displacement
=F× s
= 50 N × 10 cm
= 1 Joule
ii) opposite to that of the force
( work done is opposite ,say a stone is thrown up it will fall down so it's motion is opposite)
Work done = Force × ( - displacement)
= F × ( - s )
= 50N × (-10 cm)
= -5 Joules
iii) making an angle 60° with the force
(the angle between the direction of force and direction of displacement is acute i.e less the 90°)
Work done = Force × displacement ×
cos60°
= 50N × 10 cm× 0.5
= 2.5 Joules
iv) making an angle 120° with the force
( the angle between the direction of force and direction of displacement is obtuse i.e more the 90°)
Work done = Force × displacement ×
cos 120°
= 50N × 10 cm × ( 0.5)
= - 2.5 Joules
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Step-by-step explanation: