NCERT Solutions for Chapter: Motion and Time, Exercise 1: Exercise

An electric motor winds $200$turns of a thin copper wire on a uniform rod of diameter $10 \mathrm{cm}$, in $2 \mathrm{seconds}$. Then the length of the wire that is wound over the rod in one second is _____ $\mathrm{m}$.

A body travels with uniform motion. If it moves $10 \mathrm{m}$ in $30 \mathrm{seconds}$, it moves _____ $\mathrm{m}$ in $60 \mathrm{seconds}$.

An ant moves along the identical steps from P to Q as shown in the figure in a duration of $8.5$ seconds, then the speed and velocity of the ant respectively are _____ $\mathrm{m} {\mathrm{s}}^{-1}$ and _____ $\mathrm{m} {\mathrm{s}}^{-1}$.

Which of the following distance-time graphs is not possible? Explain why?

$20 \mathrm{m} {\mathrm{s}}^{-1} = \_\_\_\_\_ \mathrm{km} {\mathrm{h}}^{-1}$.

Riju's house is $1.5 \mathrm{km}$ from Abdul's house.Abdul's house is $0.8 km$ from Neha's house. Riju takes $15 \mathrm{minutes}$ to reach Abdul's house and Abdul takes $10 \mathrm{minutes}$ to reach Neha's house. Who walks faster Riju or Andul?

A body moves with a constant speed of $10 \mathrm{m} {\mathrm{s}}^{-1}$ for $1 \mathrm{hour}$. The distance travelled by the body is _____.

The distance-time graph for the motion of three vehicles A, B and C are as shown in the figure. $S_A, S_B$ and $S_C$

are the speeds of A, B and C, respectively. Compare the speeds of A, B and C.