NCERT Exemplar X — 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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Velocity versus time graph of a ball of mass \(50\ g\) rolling on a concrete floor is shown in figure. Calculate the acceleration and frictional force of the floor on the ball.

The acceleration (\(a\)) is,

\(a\ =\ \frac{(v-u)}{t}\)
\(a\ =\ (v-u) \times t\)

From the Newton's second law, We know that,

\(F\ =\ \frac{m}{a}\)
\(F\ =\ m \times a\)

Acceleration\(=\) \(m\ s^{-2}\)

(Note: Enter your answer with two decimal digits)

Frictional force of the floor on the ball \(=\) \(N\)

(Note: Enter your answer with four decimal digits)

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49. NCERT Exemplar X

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