Lakhmir Singh and Manjit Kaur Solutions for Chapter: Motion, Exercise 9: Multiple Choice Questions (MCQs)

A bus increases its speed from $36 \raisebox{1ex}{$\mathrm{km}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{h}$}\right.$ to $72 \raisebox{1ex}{$\mathrm{km}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{h}$}\right.$ in $10$ seconds. Its acceleration is:

A bus moving along a straight line at $20 \mathrm{m}/\mathrm{s}$ undergoes an acceleration of $4 \mathrm{m}/{\mathrm{s}}^2$. After $2$ seconds, its speed will be:

The slope of a speed-time graph gives _____.

The area under a speed-time graph represents a physical quantity, which has the unit of:

If the displacement of an object is proportional to the square of the time, then the object is moving with: 

Four cars $A$, $B$, $C$ and $D$ are moving on the levelled, straight road. Their distance-time graphs are shown in the figure. Which of the following is the correct statement regarding the motion of these cars?
  

A car of mass $1000 \mathrm{kg}$ is moving with a velocity of $10 \mathrm{m} {\mathrm{s}}^{-1}$. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of $25 \mathrm{s}$ will be:

A motorcycle is driven at a speed of $20 \mathrm{m}/\mathrm{s}$ when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be: