Q. State which of the following situations are possible and give an example for each of these:
$\left(a\right)$ An object with a constant acceleration but with zero velocity.
$\left(b\right)$ An object moving in a certain direction with an acceleration in the perpendicular direction.

Q. An athlete completes one round of a circular track of diameter $200m$ in $40s$. What will be the distance covered and the displacement at the end of $2$ minutes $20s$?

Q. The speed-time graph for a car is shown in Fig.
$\left(a\right)$ Find how far does the car travel in the first $4$ seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
$\left(b\right)$ Which part of the graph represents uniform motion of the car?

Q. A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of $3.0m/s^2$ for $8.0$s. How far does the boat travel during this time?

Q. A driver of a car travelling at $52$km $h^{-1}$ applies the brakes and accelerates uniformly in the opposite direction. The car stops in $5$s. Another driver going at $3$km $h^{-1}$ in another car applies his brakes slowly and stops in $10$s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?

Q. A ball is gently dropped from a height of $20m$. If its velocity increases uniformly at the rate of $10{ms}^{-2}$, with what velocity will it strike the ground? After what time will it strike the ground?

Q. An artificial satellite is moving in a circular orbit of radius $42250$km. Calculate its speed if it takes $24$ hours to revolve around the earth.

Q. Abdul, while driving to school, computes the average speed for his trip to be $20$km $h^{-1}$. On his return trip along the same route, there is less traffic and the average speed is $30$km $h^{-1}$. What is the average speed for Abdul's trip?

Q. Joseph jogs from one end A to the other end B of a straight $300m$ road in $2\text{min}30\text{seconds}$ and then turns around and jogs $100m$ back to point C in another $1\text{minute}$. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Q.

Fig shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:
$\left(a\right)$ Which of the three is travelling the fastest?
$\left(b\right)$ Are all three ever at the same point on the road?
$\left(c\right)$ How far has C travelled when B passes A?
$\left(d\right)$ How far has B travelled by the time it passes C?