A) \[7\text{ }m/{{s}^{2}}\]
B) \[\sqrt{7}\,m/{{s}^{2}}\]
C) \[5\text{ }m/{{s}^{2}}\]
D) \[1\,\,m/{{s}^{2}}\]
Correct Answer: C
Solution :
| Average acceleration \[=\frac{\text{Change}\,\text{in}\,\text{velocity}}{\text{Total}\,\text{time}}\] |
| \[a=\frac{|{{V}_{f}}-{{v}_{i}}|}{\Delta t}\] |
| \[=\frac{\sqrt{{{30}^{2}}+{{40}^{2}}}}{10}=\frac{\sqrt{900+1600}}{10}\] |
| \[=5\,m{{s}^{-2}}\] |
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