(a) Why are the wheels of a vehicle provided with mud-guards ?
(b) A cricket player lowers his hand while catching a ball. Why?
(c) Why is a glass pane of a window shattered when a flying pebble hits it ?
CBSE Class IX Science SA 2 (3 Marks)
Answers
Answered by
133
(a) Due to inertia of direction, wheels rotate at high speed and mud sticking to the wheel flies off tangentially.
(b) This increases the time of catching, and decreases the acceleration of the ball. Hence, force exerted on the hand is less.
(c) High velocity of pebbles decreases to zero in a very short interval of time. It remains in contact with the glass pane for longer duration and shatters the glass pane.
(b) This increases the time of catching, and decreases the acceleration of the ball. Hence, force exerted on the hand is less.
(c) High velocity of pebbles decreases to zero in a very short interval of time. It remains in contact with the glass pane for longer duration and shatters the glass pane.
Answered by
6
(a) Due to inertia of direction, wheels rotate at high speed and mud sticking to the wheel flies off tangentially.
(b) This increases the time of catching, and decreases the acceleration of the ball. Hence, force exerted on the hand is less.
(c) High velocity of pebbles decreases to zero in a very short interval of time. It remains in contact with the glass pane for longer duration and shatters the glass pane.
Hope it helps you
Similar questions