A. Fill in the blanks.
1. Standard units of measurement are known as the __________ units.
2. The standard unit of the time is _____________.
3. 1 century = _____________ years.
4. Simple pendulum exhibits _________________ motion.
5. To and fro motion in pendulum clock is called a _____________________.
B. State whether the following are true or false.
1. Sun dial and sand clock were used in ancient time. ___________
2. Cubit, hand span and foot span are standard units of measurement. ___________
3. Pendulum clock repeats its motion at equal intervals of time. ___________
4. In digital clocks, mechanical vibrations are converted into digital electronic signals. ___________
5. Sundials can also be used on rainy days. ___________
C. Answer in one word.
1. CGS stands for _____________________________
2. Motion that repeats of equal interval of time ______________________________
3. Maximum displacement of a pendulum on either side _______________________
4. Time taken to complete one revolution _____________________________
D. Choose the correct answer.
1. Which of the following is a standard unit of measurement?
a. Cubit b. Meter c. Second d. Kelvin
2. The sundial is a device for measuring.
a. Speed b. Time c. Distance d. Weight
3. Which of the following is used in sports event?
a. Sundial b. Digital Clock c. Stopwatch d. None of these
4. Pendulum clock shows which type of motion?
a. Rotational b. Rectilinear c. Periodic d. Circular
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Speed b. Time c. Distance d. Weight
3. Which of the following is used in sports event?
a. Sundial b. Digital Clock c. Stopwatch d. None of these
4. Pendulum clock shows which type of motion?
- a. Rotational
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