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Question

An object of mass $$5\ kg$$ is acted upon by a force that varies with position of the object as shown. If the object starts from rest at a point $$x=0$$. What is its speed at $$x=50m$$?
1080300_4bfd22ac2bd24e1c8be814e61066b762.png


Solution

$$W$$=area of $$F_S$$ graph = $$\Delta k$$

 $$(10\times 25)+\dfrac{1}{2}\times 25\times 10=\dfrac{1}{2}\times 5\times v^{2}$$

 $$v=\sqrt{150}=12.2ms^{-1}$$

Physics

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