Hi,
You must be aware about the equation for the motion in vector form which is given by xi+yj+zk. You have to substitute the values for x, y and z as you mentioned in the question.
For velocity, you will have to differentiate this equation with reference to t and put the value for t as given in the question. Simliarily for acceleration, you will have to double differentiate the equation and then substitute the value of t here too. You will then get your answer.
I hope this helped you.
Question : What is $\frac{\left (x^{2}-y^{2} \right)^{3}+\left (y^{2}-z^{2} \right )^{3}+\left (z^{2}-x^{2} \right )^{3}}{\left (x-y \right)^{3}+\left (y-z \right )^{3}+\left (z-x \right)^{3}}?$
Question : Let $x, y, z$ be fractions such that $x<y<z$. If $z$ is divided by $x$, the result is $\frac{5}{2}$, which exceeds $y$ by $\frac{7}{4}$. If $x+y+z=1 \frac{11}{12}$, then the ratio of $(z-x):(y-x)$ is:
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