Question

when a force is parallel to the direction of the motion , then the work done on the body will be -
zero
maximum
minimum
infinity.

pls provide an explained answer!​

Answer 1

Answer:

according to me it is maximum

Explanation:

because

When a force is parallel to the direction of motion

the body, then work done on the body is moving in. perpendicular to the direction

Answer 2

Work done is maximum .

But how ?

The work done is calculated as the scalar product of force vector and displacement vector.

$W = \vec{F}. \vec{d}$

$\implies \: W = | \vec{F}| | \vec{d} | \times \cos( \theta)$

• When force is parallel to displacement , the value of $\theta$ = 0°.

• So, value of $\cos\theta$ is maximum for 0° (i.e. 1)

$\implies \: W = | \vec{F}| | \vec{d} | \times \cos( {0}^{ \circ} )$

$\implies \: W = | \vec{F}| | \vec{d} |$

So , work done is maximum.