Question

Work is negative when the angle between the force and displacement is

• A. ${90}^0$
• B. ${30}^0$
• C. ${180}^0$
• D. $0^0$

Answer 1

The correct option is C ${180}^0$

$F=$ Force ,$d=$Displacement, $\theta =$Angle between force and displacement
$W=F.D.cos\theta$
$cos{180}^0=-1$
So, in case of negative work, the angle between the force and displacement is ${180}^0$.
Hence, option C is correct.