A) 5 seconds
B) 20 seconds
C) 40 seconds
D) 80 seconds
Correct Answer: C
Solution :
\[{{u}_{y}}=40\,m/s\], \[{{F}_{y}}=-5N\], \[m=5\,kg\]. So \[{{a}_{y}}=\frac{{{F}_{y}}}{m}=-1\,m/{{s}^{2}}\] (As \[v=u+at\]) \ \[{{v}_{y}}=40-1\times t=0\] Þ \[t=40\,\sec \].You need to login to perform this action.
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