You lift a heavy book from the floor of the r | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The work done $(W)$ by an external force in lifting an object against gravity is given by the formula: $W = mgh$.Here,$m$ is the mass of the objec

Vedclass · Accepted Answer

Weight of the book and height of the bookshelf

Vedclass · Answer

(B) The work done $(W)$ by an external force in lifting an object against gravity is given by the formula: $W = mgh$.Here,$m$ is the mass of the object,$g$ is the acceleration due to gravity,and $h$ is the vertical displacement (height).Since the weight of the book is $W_b = mg$,the work done can be expressed as $W = W_b 	imes h$.Therefore,the work done depends only on the weight of the book and the height of the bookshelf.It does not depend on the time taken to perform the work,as time is a factor in calculating power,not work.

You lift a heavy book from the floor of the room and keep it in the bookshelf having a height of $2 \, m$. In this process,you take $5 \, s$. The work done by you will depend upon:

Similar Questions

$A$ particle of mass $m$ is projected at an angle $\alpha$ to the horizontal with initial velocity $u \ m/s$. What is the work done by gravity during the time it reaches its highest point?

If a force $(3 \hat{i} + 2 \hat{j} + 5 \hat{k}) \text{ N}$ acting on a body displaces it through $(2 \hat{i} + 2 \hat{j} + 1 \hat{k}) \text{ m}$,then the work done by the force on the body is (in $J$)

$A$ string is used to pull a block of mass $m$ vertically up by a distance $h$ at a constant acceleration $\frac{g}{3}$. The work done by the tension in the string is ..............

$A$ force $F = (5\hat{i} + 3\hat{j}) \ N$ acts on an object,causing a displacement of $r = (2\hat{i} - 1\hat{j}) \ m$. Calculate the work done in $J$.

$A$ force $\vec F = 6\hat i + 2\hat j - 3\hat k$ acts on a particle,causing a displacement $\vec d = 2\hat i - 3\hat j + c\hat k$. If the work done during this process is zero,find the value of $c$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module