Measurement of Time and Motion Class 7 Fill in the Blanks
hardMeasurement of Time and Motion Class 7 Fill in the Blanks
Measurement of Time and Motion Class 7 Fill in the Blanks
Question 1.
A ............ is a device that measures time based on the position of the sun's shadow.
Answer:
sundia
Question 2.
The ............ of a pendulum is the maximum distance it moves from its mean position.
Answer:
amplitude
Question 3.
Galileo discovered that the time taken for a pendulum to swing is ............ for a given length.
Answer:
constant
Question 4.
The ............ of an object is the total distance covered divided by the total time taken.
Answer:
average speed
Question 5.
The ............ clock was a significant advancement in timekeeping in the 17th century.
Answer:
pendulum
Measurement of Time and Motion Class 7 True or False
Question 1.
The time taken by a pendulum to complete one oscillation is called its frequency.
Answer:
False
Explanation: The time taken to complete one oscillation is called the time period, not frequency. Frequency is the number of oscillations per unit time.
Question 2.
A pendulum's time period changes with the length of the string.
Answer:
True
Explanation: The time period of a simple pendulum is dependent on its length; a longer string results in a longer time period.
Question 3.
In uniform motion, an object covers equal distances in equal intervals of time.
Answer:
True
Explanation: This is the definition of uniform motion; the speed remains constant, resulting in equal distances covered in equal time intervals.
Question 4.
The time period of a pendulum is constant at a given place.
Answer:
True
Explanation: For a pendulum of a specific length, the time period remains constant at a particular location, assuming no changes in gravitational force.
Question 5.
The hourglass measures time based on the flow of sand from one bulb to another.
Answer:
True
Explanation: An hourglass operates by allowing sand to flow from one bulb to another, thus measuring time.
Measurement of Time and Motion Class 7 Match the Following
Question 1.
| Column A | Column B |
| (a) Uniform Motion | (i) Time taken for one complete oscillation |
| (b) Non-uniform Motion | (ii) Changes speed frequently |
| (c) Average Speed | (iii) [latex]\frac{\text { Total distance }}{\text { Total time }}[/latex] |
| (d) Water Clock | (iv) Measures time using flowing water |
| (e) Time Period | (v) Constant for a given length |
Answer:
| Column A | Column B |
| (a) Uniform Motion | (v) Constant for a given length |
| (b) Non-uniform Motion | (ii) Changes speed frequently |
| (c) Average Speed | (iii) [latex]\frac{\text { Total distance }}{\text { Total time }}[/latex] |
| (d) Water Clock | (iv) Measures time using flowing water |
| (e) Time Period | (i) Time taken for one complete oscillation |
Question 2.
| Column A | Column B |
| (a) Simple Pendulum | (i) Measures speed of a vehicle |
| (b) Odometer | (ii) Time taken for one complete oscillation |
| (c) Uniform Motion | (iii) Covers equal distances in equal intervals of time |
| (d) Time Period | (iv) Bob suspended by a string |
| (e) Speedometer | (v) Measures total distance travelled |
Answer:
| Column A | Column B |
| (a) Simple Pendulum | (iv) Bob suspended by a string |
| (b) Odometer | (v) Measures total distance travelled |
| (c) Uniform Motion | (iii) Covers equal distances in equal intervals of time |
| (d) Time Period | (ii) Time taken for one complete oscillation |
| (e) Speedometer | (i) Measures speed of a vehicle |