Physics · 2015
NEET 2015 · 3 May · Code E · Q7
A block of mass 10 kg, moving in x direction with a constant speed of 10 ms^-1, is subjected to a retarding force F =0.1 x J / m during its travel…
A block of mass $\displaystyle 10$ kg, moving in $\displaystyle x$ direction with a constant speed of $\displaystyle 10 \mathrm{~ms}^{-1}$, is subjected to a retarding force $\displaystyle \mathrm{F}=0.1 x \mathrm{~J} / \mathrm{m}$ during its travel from $\displaystyle x=20 \mathrm{~m}$ to $\displaystyle 30$ m. Its final KE will be :
Official answer
(1)
$\displaystyle 475$ J
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NEET (UG) 2015 Physics question, with the answer from NTA’s final answer key. Where our answers come from.