In which of the following case the work done by a force will be maximum: when the angle between the direction of force and direction of motion is $0^{\circ} o r 90^{\circ}$ ?

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Solution

Work done is maximum when force and displacement are in the same direction as $θ$ = 0, implying W = FS Cos(0) = FS

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Same amount of force $10 N$ is acting on two bodies in two different ways.
$C a s e 1 :$ Force is acting in the direction of displacement of the body.
$C a s e 2 :$ Force is making an angle of 60° with the direction of displacement.
If the displacement is 'd' meters in both the cases, then what is the relation between the work done in both the cases?

Q. The work done by a force acting obliquely is given by the formula : W = F cos θ ✕ s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant.

Q. What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?

A force F acts on a body and displaces it by a distance S in a direction at an angle $θ$ with the direction of force.

(a) Write the expression for the work done by the force.

(b) What should be the angle between the force and displacement to get (i) zero, (ii) maximum, work?

How is the work done by a force measured when (i) force is in direction of displacement, (ii) force is at an angle to the direction of displacement?

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In which of the following case the work done by a force will be maximum: when the angle between the direction of force and direction of motion is 0∘or90∘?

Work done is maximum when force and displacement are in the same direction as θ = 0, implying W = FS Cos(0) = FS

In which of the following case the work done by a force will be maximum: when the angle between the direction of force and direction of motion is $0^{\circ} o r 90^{\circ}$ ?

Work done is maximum when force and displacement are in the same direction as $θ$ = 0, implying W = FS Cos(0) = FS