- ABe double.
- BBe half.
- CBe four times.
- DRemain same.
Explanation:
$\text{Breaking stress}=\frac{\text{Breaking force}}{\text{Area of cross - section}}$
Since breaking force doesn't depend on length, hence changing the cross section has no effect.
So the breaking force remain same.
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Assertion $(A)$ :When a fire cracker (rocket) explodes in mid air, its fragments fly in such a way that they continue moving in the same path, which the fire cracker would have followed, had it not exploded
Reason $(R)$:Explosion of cracker (rocket) occurs due to internal forces only and no external force acts for this explosion.
In the light of the above statements, choose the most appropriate answer from the options given below :
