Question

C. Circle the odd-one out giving appropriate reason.
1. Periodic motion, Oscillatory motion, Vibratory motion, Random m
2. Sundial, Water clock, Stopwatch, Table clock
3. Simple pendulum, Bob, Mean position of the bob, Balance whe
4. Speed, Metre per second, Speedometer, Odometer​

Answer 1

Explanation:

1 random motion

2 stopwatch

3 balance weight

3 metre per second

Answer 2

The correct answers are Random motion, Stopwatch, Balance weight, and Odometer.

1. Oscillatory motion, Vibratory motion, and Periodic motion are all to and fro motions, hence random motion is the odd one out.
2. Sundial, a water clock and a Table clock are used to show the current time. A stopwatch is used to measure time and hence it's the odd one out.
3. Bob, the Mean position of the bob and the Simple pendulum are all related to Pendulum motion, and hence Balance weight is the odd one out.
4. Speed, metre per second, and Speedometer are all related to speed, unit, and measuring device. While an odometer is used to measure distance hence it's the odd one out.

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