Measurement of Time and Motion Class 7 Assertion and Reason Questions

Measurement of Time and Motion Class 7 Assertion and Reason Questions

Measurement of Time and Motion Class 7 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options.

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): A car moving at a constant speed of 60 km/h is said to be in uniform motion.

(R): Uniform motion occurs when an object covers equal distances in equal intervals of time.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

2. (A): Non-uniform motion is more common in daily life compared to uniform motion.

(R): Non-uniform motion occurs when the speed of an object changes over time, which is typical in urban traffic conditions.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

3. (A): The average speed of an object is calculated by dividing the total distance covered by the total time taken.

(R): Average speed can be greater than the maximum speed of the object during its journey.

Answer:

(c) A is true, but R is false.

4. (A): A pendulum's time period is affected by its length.

(R): The time period of a pendulum is constant for a given length at a specific location.

Answer:

(b) Both A and R are true, but R is not the correct explanation of A.

5. (A): Water clocks were one of the earliest devices used to measure time.

(R): They measure time based on the flow of water, which is a consistent and reliable method.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.