Motion of a vehicle on a straight road is not rectilinear motion.

Explanation:

Rectilinear motion refers to the motion of an object along a straight line. In rectilinear motion, the object moves in a straight path without any change in its direction. Therefore, the statement that the motion of a vehicle on a straight road is not rectilinear motion is incorrect.

- Definition of rectilinear motion:

Rectilinear motion is the type of motion in which an object moves along a straight line. It means that the object's path is a straight line, and it does not deviate from this line during its motion. In rectilinear motion, the object's velocity can change, but its direction remains constant.

- Motion of a vehicle on a straight road:

When a vehicle moves on a straight road, it follows a straight path without any change in its direction. As long as the vehicle does not turn or deviate from the straight road, its motion can be considered as rectilinear motion. The wheels of the vehicle are aligned along the straight road, and the vehicle moves forward in a straight line.

- Example of rectilinear motion:

The motion of a car moving on a straight highway is an example of rectilinear motion. The car moves along the straight road without any change in its direction. Similarly, a train moving on a straight railway track also exhibits rectilinear motion.

- Other types of motion:

There are other types of motion apart from rectilinear motion. These include curvilinear motion, circular motion, and random motion.

- Curvilinear motion: In this type of motion, an object moves along a curved path. The object changes its direction as it moves.

- Circular motion: Circular motion refers to the motion of an object around a fixed point or along a circular path. The object continuously changes its direction while moving in a circular path.

- Random motion: Random motion is the type of motion in which an object moves in an unpredictable or random manner. The object's path cannot be defined by a specific pattern, and it changes its direction and speed randomly.

In conclusion, the statement that the motion of a vehicle on a straight road is not rectilinear motion is incorrect. When a vehicle moves on a straight road without any change in its direction, it exhibits rectilinear motion.