Measurement of Time and Motion — Practice

Q1. What is the SI unit of time and its symbol?

• A. minute, min
• B. hour, h
• C. ghati, gh
• D. second, s

Q2. How many seconds make one minute?

• A. 10
• B. 24
• C. 60
• D. 100

Q3. How many minutes make one hour?

• A. 30 min
• B. 45 min
• C. 60 min
• D. 100 min

Q4. In a simple pendulum, the small metallic ball at the lower end of the thread is called the

• A. Bob
• B. Knot
• C. Hook
• D. Disc

Q5. The time taken by a pendulum to complete one oscillation is called its

• A. Frequency
• B. Amplitude
• C. Wavelength
• D. Time period

Q6. What is the SI unit of speed?

• A. kilometre/hour (km/h)
• B. second (s)
• C. metre/second (m/s)
• D. metre (m)

Q7. The speed of an object is calculated using which of the following formulas?

• A. Speed = Time / Distance
• B. Speed = Distance x Time
• C. Speed = Total distance / Total time
• D. Speed = Distance + Time

Q8. An object moving along a straight line with a constant speed is said to be in

• A. Non-uniform linear motion
• B. Uniform linear motion
• C. Circular motion
• D. Oscillatory motion

Q9. In a sundial, the time during the day is determined using

• A. The flow of water
• B. The flow of sand
• C. The changing position of the shadow of an object cast by the Sun
• D. The burning of a candle

Q10. The world's largest stone sundial, the Samrat Yantra, is located at

• A. Delhi
• B. Jantar Mantar, Jaipur
• C. Konark, Odisha
• D. Ujjain, Madhya Pradesh

Q11. A simple pendulum at rest hangs in its

• A. Extreme position A
• B. Extreme position B
• C. Mean position
• D. Tilted position

Q12. The speedometer fitted in a scooter or car shows the vehicle's

• A. Distance travelled in km
• B. Speed in km/h
• C. Fuel level in litres
• D. Engine temperature

Q13. Five children begin a 100 m race together. After 10 seconds, Anil is ahead of the rest. We can say

• A. Anil is the slowest
• B. All five are running at the same speed
• C. Anil has stopped
• D. Anil is running faster than the others

Q14. The time period of a simple pendulum depends on its

• A. Length
• B. Mass of the bob
• C. Colour of the bob
• D. Material of the thread

Q15. Looking at the wall clock shown in Fig. 8.9 in Activity 8.3, the smallest interval of time it can measure is

• A. 1 hour
• B. 1 minute
• C. 1 second
• D. 1 millisecond