Question

Match each item of column

1

with the corresponding item of column

2

.

Column 1	Column 2
1. Second	a. instrument to measure time
2. Clock	b. flat distance-time graph
3. Pendulum	c. SI unit of time
4. Zero speed	d. measured in $m / s$ or $km / h$
5. Speed	e. periodic motion

Accepted Answer

$1$ . Second $\to$ $c$ . SI unit of time.
The SI unit is time is second. Minute, hour and year are other longer units of time. A minute has $60$ seconds and an hour has $3600$ seconds.

$2$ . Clock $\to$ $a$ . instrument to measure time.
Clock helps us to measure time. Sundial, sand clock and water clock were used to measure time in ancient times. A sundial uses the movement of the sun across the sky to calculate the time of the day.

$3$ . Pendulum $\to$ $m / s$ . periodic motion.
The motion of a pendulum repeats itself after a fixed interval of time. The time taken to complete one oscillation is called time period.

$4$ . Zero speed $\to$ $b$ . flat distance-time graph.
Zero speed indicates that the object is at rest and the position of the object is not changing with time. Therefore, for zero speed the distance-time graph will have a line parallel to x-axis.

$5$ . Speed $\to$ $d$ . measured in $m / s$ or $km / h$ .
Distance is measured in metre or kilometre. Time is measured in second or hour. Therefore, speed is measured in $m / s$ or $km / h$ . Speed is a scalar quantity, as it does not depend upon the direction of motion of the object.

Column 1 Column 2

1. Second c. SI unit of time.

2. Clock a. instrument to measure time.

3. Pendulum e. periodic motion.

4. Zero speed b. flat distance-time graph.

5. Speed d. measured in $m / s$ or $km / h$ .

Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 2: Exercises

Vaishali Gupta Science Solutions for Exercise - Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 2: Exercises

Questions from Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 2: Exercises with Hints & Solutions

Learn and Prepare for any exam you want !