A) \[2.7m/{{s}^{2}}\]
B) \[1.08m/{{s}^{2}}\]
C) \[1m/{{s}^{2}}\]
D) \[0.75m/{{s}^{2}}\]
Correct Answer: D
Solution :
Acceleration \[\text{=}\frac{\text{change}\,\text{in}\,\text{velocity}}{\text{time}}\] \[=\frac{54km/h-0}{20}=\frac{54m/s-0}{20}=0.75m/{{s}^{2}}\] \[\left( \because 54\,km/h\frac{54\times 1000m}{3600\sec }=15m/s \right)\]
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