NCERT Exemplar II — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goal keeper to

decrease the rate of change of momentum
reduce the force exerted by the ball on hands
increase the rate of change of momentum
exert larger force on the ball

2. The inertia of an object tends to cause the object

to resist any change in its state of motion
to increase its speed
to decelerate due to friction
to decrease its speed

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