(C) Work done is defined by the formula $W = F \cdot s \cdot \cos(\theta)$,where $F$ is the force,$s$ is the displacement,and $\theta$ is the angle be

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(C) Work done is defined by the formula $W = F \cdot s \cdot \cos(\theta)$,where $F$ is the force,$s$ is the displacement,and $\theta$ is the angle between them.When force and displacement are in mutually opposite directions,the angle $\theta$ is $180^o$.Since $\cos(180^o) = -1$,the work done becomes $W = -F \cdot s$,which is negative work.

Class 9 Science WORK AND ENERGY Mix Example - WORK AND ENERGY

Easy

In case of negative work,the angle between the force and displacement is: (in $^o$)

A
$0$
B
$45$
C
$180$
D
$90$

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Mix Example - WORK AND ENERGY

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In case of negative work,the angle between the force and displacement is: (in $^o$)

Similar Questions

$A$ light and a heavy object have the same momentum. Find the ratio of their kinetic energies. Which one has a larger kinetic energy?

$A$ $1 \, kg$ mass has a kinetic energy of $1 \, J$ when its speed is: (in $, m/s$)

An object of mass $5\,kg$ falls from a height of $5\,m$ above the ground. The loss of potential energy of the mass is:

Which would have a greater effect on the kinetic energy of an object - doubling the mass,or doubling the velocity?

Define potential energy. Write an expression for potential energy. Write the $SI$ unit of potential energy.

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