Dr. S K Jain and Dr. Shailesh K Jain Solutions for Chapter: Motion, Exercise 8: PERIODIC TEST

A body has an acceleration of $-2.5 \mathrm{m}/{\mathrm{s}}^2$. What is its retardation?

How can the position of an object be described?

A boy travels $5 \mathrm{km}$ from his house to reach his school. On finding it closed, he returns to his house. What is, (i) the distance travelled by the boy? (ii) the final displacement of the boy?

A quantity is measured to be $-20 \mathrm{m}/\mathrm{s}$. Is it speed or velocity? Give reasons.

The velocity-time graph of a body has a negative slope. The body is undergoing 

Distance-time and displacement-time graphs for a body under all conditions are identical. 

The speed of a body at rest is equal to the slope of its distance-time graph. 

For circular motion, $\mathrm{Linear} \mathrm{velocity}=\mathrm{Angular} \mathrm{velocity}\times \mathrm{Radius} \mathrm{of} \mathrm{the} \mathrm{circle}$