What is the difference between oscillatory and vibratory motions?

Do you consider travelling in a taxi in your town as uniform or non-uniform motion. Why?

A body at rest or in motion is relative to the movement of the observer. Explain the meaning of this statement with a suitable example.

A boy walks to a shop that is $3 \mathrm{km}$ away from his home, connected by a straight road. He reaches the shop in $30 \mathrm{minutes}$. What is the uniform speed at which he walks?

A boy walks to a shop is $3 \mathrm{km}$ away from his home, connected by a straight road. He reaches the shop in $30 \mathrm{minutes}$. As soon as he reached the shop, he saw that it was closed. So he rushed back home at a uniform speed of $8 \mathrm{km}/\mathrm{h}$. How long did he take to reach back?

A car travels uphill on a straight road at a speed of $30 \mathrm{km}/\mathrm{h}$. It took $10 \mathrm{minutes}$ to reach the top. If it comes downhill at a speed of $60 \mathrm{km}/\mathrm{h}$, how much time will it take to reach the foot of the hill?