If the velocity is\(\overrightarrow{\mathrm{v}}\) – 2\(\hat{i}\) +t2\(\hat{j}\) – 9\(\overrightarrow{\mathrm{k}}\) , then the magnitude of acceleration at t = 0.5 s is
A. 1 m s-2
B. 1 m
C. zero
D. -1 m s s-2
Answer:A
If the velocity is\(\overrightarrow{\mathrm{v}}\) – 2\(\hat{i}\) +t2\(\hat{j}\) – 9\(\overrightarrow{\mathrm{k}}\) , then the magnitude of acceleration at t = 0.5 s is
A. 1 m s-2 B. 1 m C. zero D. -1 m s s-2