Sunil Batra Solutions for Chapter: Motion, Exercise 2: Formative Assessment

An object travels eastwards with a speed of $5 \mathrm{m}/\mathrm{s}$ and then turns northwards and travels with the same speed of $5 \mathrm{m}/\mathrm{s}$. Is there any acceleration?

If we get a straight line inclined to time-axis in $x$-$t$ graph, the body is moving with constant _____. (speed/acceleration)

If we get a straight line parallel to time axis in v-t graph, the body is moving with _____. (constant distance/ constant velocity/ constant acceleration)

The physical quantity which is represented by the area under the line of velocity-time graph is _____.

The time taken for a stone to reach the highest point of its journey when thrown vertically upwards with a speed of $9.8 \mathrm{m} {\mathrm{s}}^{-1}$ is _____ $\mathrm{s}$.

The total time taken by the stone thrown vertically upwards with a speed of $9.8 \mathrm{m} {\mathrm{s}}^{-1}$ to reach back to the point from which it is thrown is _____ $\mathrm{s}$. $\left(\mathrm{g}=9.8 \mathrm{m} {\mathrm{s}}^{-2}\right)$

For a freely falling body, the acceleration is _____ $\mathrm{m} {\mathrm{s}}^{-2}$.

_____ provides the required centripetal force in planetary motion. (Gravitational force / Nuclear force / Electrostatic force)