Question

Whenever angle $\left(\theta \right)$ between the force and the displacement is obtuse, i.e., ${90}^{\circ }<\theta <{180}^{\circ }$, the work done is negative.

• A. True
• B. False
• C. Ambiguous
• D. Data insufficient

Answer 1

The correct option is A True

we know,
W$=F\times S\times cos\theta$
if $\theta willbegreaterthan{90}^{0}thenthevalueofcos\theta willbenegative$
hence,the Workdone will be negative.