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A body of mass 2kg has an initial speed ...

A body of mass 2kg has an initial speed 5 m/s. A force acts as it for some time in the direction of motion. The force-time graph is shown in figure. Find the final speed of the body.

Text Solution

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Area of OAF `=1/2 xx 2 xx 4 =4` Area of BGHC `=1/2 (4+2.5) xx 0.5 = 1.625`
Area of ABG `F = 2 xx 4=8`
Area of CDEH `=2 xx 2.5=5`
Total. Area = Change in momentum `=18.625`
`m(v-u) = 18.625 V = (18.625)/2 + 5, V= 14.25 m//s`
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