Read the following statements and mark True (T) or False (F) against each.
The motion of a car moving on a straight road is an example of linear motion.
True. When an object moves along a straight line, its motion is called linear motion. A car moving on a straight road follows a straight-line path.
Any object which is changing its position with respect to a reference point with time is said to be in motion.
True. An object is said to be in motion if its position changes with respect to the reference point with time.
1 km = 100 cm
False. 1 km = 1000 m, and 1 m = 100 cm, so 1 km = = 1,00,000 cm.
Explanation
(i) The chapter defines linear motion as motion along a straight line. A car on a straight road moves in a straight line, making it an example of linear motion. (ii) This is the exact definition of motion given in the chapter on Page 12: 'An object is said to be in motion if its position changes with respect to the reference point with time.' (iii) The chapter clearly states on Page 5 that 1 km = 1000 m and 1 m = 100 cm. Therefore, 1 km equals 1,00,000 cm, not 100 cm.