Question

MOTION AND TIME

I. Choose the best answer: 4 x 1 = 4

1. Which one of these is not a unit of time?

a. m/s b. week c. month d. year

2. A motion that repeats itself at equal intervals of time is called

a. linear motion b. circular motion c. periodic motion d. none of these

3. In a distance time graph, uniform motion will be a

a. curved line b. straight line c. a circle d. a bent line

4. Which one of these is not used for measuring time?

a. pendulum b. hour glass c. meter scale d. sun dial

II. Answer the following briefly: (Any 3) 3 x 2 = 6

1. What are the parts of simple pendulum?

2. What is average speed?

3. Name two types of clocks used in ancient times.

4. Name two units of time other than the SI unit.

III. Answer in detail: (Any 2) 2 x 5 = 10

1. Write a short note on the different types of clocks used from ancient times to the present.

2. How can we determine the speed of an object from its distance time graph?

3. Explain the factors on which the time period of simple pendulum depends.​

Answer 1

Answer:

iii) 1 In Ancient time there was water clock, candle clocks, sand clocks, sundial, candle clock and incense clocks used to measure time. At present time we use digital clock, mechanical clock, electrical clocks.