The work done by a force on a body will be po | vedclass

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

Question

(D) The work done $(W)$ by a force $(F)$ on a body is given by the formula $W = F \cdot s \cdot \cos(	heta)$,where $s$ is the displacement and $	het

Vedclass · Accepted Answer

body moves along the direction of the applied force

Vedclass · Answer

(D) The work done $(W)$ by a force $(F)$ on a body is given by the formula $W = F \cdot s \cdot \cos(	heta)$,where $s$ is the displacement and $	heta$ is the angle between the force and the displacement.For the work done to be positive,$\cos(	heta)$ must be positive,which occurs when $0^\circ \le 	heta This means the body must move in the same direction as the applied force (or at an acute angle to it).Therefore,if the body moves along the direction of the applied force,the work done is positive.

The work done by a force on a body will be positive if the:

Similar Questions

List two conditions which need to be satisfied for the work to be done on an object.

Justify,giving proper reasoning,whether the work done in the following case is positive or negative: Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.

Give an example of negative work.

What is the work done by a coolie walking on a horizontal platform with a load on his head?

$A$ mass of $10\, kg$ is at a point $A$ on a table. It is moved to a point $B$. If the line joining $A$ and $B$ is horizontal,what is the work done on the object by the gravitational force? Explain your answer.

Vedclass Test Series

Exam Paper Generator

Online Exam Module