Question

The work done is vertically raising a body of mass M through a distance b is given to be W. If the same body of mass M is raised to the same vertical height b by pulling it up along a plane inclined at an angle theta with the horizontal, then the work done in this case is?
$1$. A function of force applied along the plane
$2$. A function of M $\cos \theta$
$3$. A function of g $\sin \theta$, g being acceleration due to gravity
$4$. The same value W
Which of the given are correct? Choose the answer from the codes given.

• A. $3$ and $4$
• B. $1$ and $3$
• C. $1$ and $2$
• D. $4$ only

Answer 1

The correct option is D $4$ only

The work done by a body doesn't depends upon the function of force aplied and the angle $\theta$. So, the value of work done will remain same in inclined plane. $W=mgh$

$W=$work done

$m=$mass

$h=$height

$g=$gravitational constant