A small body is projected with a velocity of 20.5 ms−1 on a rough horizontal surface. The coefficient of friction (μ) between the surface changes with time (t in s) as the body moves along the surface. The velocity at the end of 4 s in ms−1 will be . (take g=10 ms−2)

A small body is projected with a velocity of 20.5 ms−1 on a rough ho

1.	A small body is projected with a velocity of 20.5 ms−1 on a rough horizontal surface. The coefficient of friction (μ) between the surface changes with time (t in s) as the body moves along the surface. The velocity at the end of 4 s in ms−1 will be . (take g=10 ms−2)
Answer» A small body is projected with a velocity of $20.5 {ms}^{- 1}$ on a rough horizontal surface. The coefficient of friction $(μ)$ between the surface changes with time ( $t$ in $s$ ) as the body moves along the surface. The velocity at the end of $4 s$ in ${ms}^{- 1}$ will be . (take $g = 10 {ms}^{- 2}$ )

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A small body is projected with a velocity of 20.5 ms−1 on a rough horizontal surface. The coefficient of friction (μ) between the surface changes with time (t in s) as the body moves along the surface. The velocity at the end of 4 s in ms−1 will be . (take g=10 ms−2)

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