Answer:
When the bullet strikes the glass pane, the part of the glass pane which comes in contact with the bullet immediately shares the large velocity of bullet and makes a hole. While the remaining part of the glass remains at restand is therefore not smashed due to inertia of rest.
Bullet has higher velocity than stone due to which it remain in contact with the glass for shorter time due to which force get spread over a limited area but in case of stone,time of contact is suffucient for the force to spreal over the glass.
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