What are the answers to the following questions about units of length, motion, and transportation?

here are the solutions to the exercise questions:

A. Darken the circle for correct option in OMR Sheet:

1. d) Face
   • Explanation: Finger, hand, and foot were historical units of length. "Face" is not a unit of length.
2. c) $\text{0.025 km}$
   • Explanation:
     • $2.5 \text{ m} = 2.5 \times 100 \text{ cm} = 250 \text{ cm}$
     • $2.5 \text{ m} = 2.5 \times 1000 \text{ mm} = 2500 \text{ mm}$
     • $2.5 \text{ m} = \frac{2.5}{1000} \text{ km} = 0.0025 \text{ km}$ Therefore, $0.025 \text{ km}$ is not equal to $2.5 \text{ m}$.
3. d) rectilinear motion
   • Explanation: Motion along a straight track is specifically called rectilinear motion.
4. b) random
   • Explanation: A kite's movement in the sky is often unpredictable and irregular, fitting the description of random motion.
5. a) periodic
   • Explanation: Periodic motion is defined as motion that repeats itself after a fixed interval of time.

B. Fill in the blanks:

1. The early people used modes of transport to help them move from one place to another.
2. The invention of the wheel proved to be a revolution in our means of transportation.
3. One metre is equal to 1000 millimetre.
4. Rest and motion are relative terms.
5. When you push a box on the floor, it undergoes translatory motion.

C. Write 'T' for True and 'F' for False statements:

1. When you travel by a train or a car, the person sitting next to you is at rest with respect to you. T
2. The motion of a swing is an example of rectilinear motion. F
   • Explanation: The motion of a swing is oscillatory, not rectilinear.
3. The motion of a spinning top is an example of rotatory motion. T
4. The motion of a pendulum is an example of oscillatory motion. T
5. The motion of a wheel of a moving car is an example of rotatory motion. T