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Motion Lessons
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Post a LessonAnswered on 18 Apr Learn CBSE/Class 9/Science/Unit 3-Motion, Force and Work/Motion
Nazia Khanum
i) Motion of a Car around a Curve:
ii) Motion of an Electron Orbiting around a Nucleus:
Answer to Question (b):
Given:
To Calculate:
Solution:
Convert the time from hours to seconds since speed is measured in meters per second.
Apply the formula for the speed of an object in circular motion:
Substitute the given values into the formula:
Result:
Answered on 18 Apr Learn CBSE/Class 9/Science/Unit 3-Motion, Force and Work/Motion
Nazia Khanum
Understanding Uniform and Non-Uniform Motion
Uniform Motion: Uniform motion refers to the movement of an object at a constant speed in a straight line, maintaining the same velocity throughout its journey. In this type of motion, the object covers equal distances in equal intervals of time.
Example of Uniform Motion:
Non-Uniform Motion: Non-uniform motion occurs when an object changes its speed or direction over time. Unlike uniform motion, the velocity of an object in non-uniform motion is not constant; it may vary at different points during its journey.
Example of Non-Uniform Motion:
Answered on 18 Apr Learn CBSE/Class 9/Science/Unit 3-Motion, Force and Work/Motion
Nazia Khanum
Given Information:
Step 1: Calculate the total distance traveled
Total distance = 15 km+25 km+80 km=120 km15km+25km+80km=120km
Step 2: Calculate the total time taken
Total time taken = 0.5 h+1 h+2 h=3.5 h0.5h+1h+2h=3.5h
Step 3: Calculate the average speed
Average speed = Total distance / Total time taken
Average speed = 120 km/3.5 h=34.29 km/h120km/3.5h=34.29km/h
Step 4: Final Answer
Therefore, the average speed of the car is 34.29 km/h34.29km/h.
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