CBSE Class 11-science Answered
clear my doubt
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Asked by subhashreeojha235 | 20 Jul, 2023, 11:22: AM
Part (i)
Average speed between t =2 s and t = 6 s is
![begin mathsize 14px style top enclose v space equals space fraction numerator d i s tan c e space t r a v e l l e d over denominator t i m e end fraction space end style](https://images.topperlearning.com/topper/tinymce/cache/008c4a48d7cfbd8d517af0846ee9fdca.png)
![begin mathsize 14px style top enclose v space equals space πr subscript 1 over 4 space equals space fraction numerator straight pi space cross times 10 over denominator 4 end fraction space m divided by s space equals space 2.5 space straight pi space straight m divided by straight s end style](https://images.topperlearning.com/topper/tinymce/cache/a74dbcf99159413cbc48a0d25ee9001b.png)
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Part (ii)
Average speed between t = 2 s to t = 10 s is
![begin mathsize 14px style top enclose v space equals space fraction numerator d i s tan c e space t r a v e l l e d over denominator t i m e end fraction space equals space fraction numerator πr subscript 1 space end subscript plus space straight pi space straight r subscript 2 over denominator 8 end fraction space end style](https://images.topperlearning.com/topper/tinymce/cache/dc92cb2954c67777ef6daf0a87dc6a09.png)
![begin mathsize 14px style top enclose v space equals space space space fraction numerator straight pi space cross times 10 space plus space straight pi space cross times 10 over denominator 8 end fraction space m divided by s space equals space 2.5 space straight pi space straight m divided by straight s end style](https://images.topperlearning.com/topper/tinymce/cache/cbf2e2a400f2bb9ccc6b7a5f25ec1424.png)
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Part (iii)
Average velocity between t=2 s to t = 12 s is
![begin mathsize 14px style v with rightwards arrow on top subscript a v g end subscript space equals space fraction numerator d i s p l a c e m e n t space over denominator t i m e end fraction space equals space fraction numerator 50 space m over denominator 10 space s end fraction space equals space 5 space m divided by s end style](https://images.topperlearning.com/topper/tinymce/cache/37a6aa3155fd720cbd37da8e7b4a10c2.png)
Answered by Thiyagarajan K | 20 Jul, 2023, 21:37: PM
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