Position vs time graph

Q. The position-time graph of a particle moving along x -axis is given as

The particle reverses its direction at

1. O
2. A
3. B

Q. The position $\left(x\right)$ - time $\left(t\right)$ graphs for two children $A$ and $B$ returning from their school $O$ to their homes $P$ and $Q$ respectively along straight line path (taken as x-axis) are shown in figure below. Choose the incorrect statement:

1. $A$ lives closer to the school than $B$.
2. $A$ starts from the school earlier than $B$.
3. $A$ and $B$ have equal average velocities from $0$ to $t_0$.
4. $B$ overtakes $A$ on the way.

Q.

When does the body come back to its starting point?

1. 5 sec

2. 10 sec

3. 20 sec

4. 30 sec

Q.

When does the body come back to its starting point?

1. 5 sec

2. 10 sec

3. 20 sec

4. 30 sec

Q. Shape of position-time graph represents actual trajectory of the particle.

1. True
2. False

Q.

A ball is in a hot air balloon that starts from rest at t = 0 and accelerates upwards at 2m/s². After 10s, the ball is dropped from the balloon

The position time graph will be?

1. 

2. 

3. 

4.