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Two observers are moving towards each other at speeds of 20 m/s and 30 m/s. What
Two observers are moving towards each other at speeds of 20 m/s and 30 m/s. What is the speed of one observer as seen by the other?
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Practice Questions
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Q1
Two observers are moving towards each other at speeds of 20 m/s and 30 m/s. What is the speed of one observer as seen by the other?
10 m/s
20 m/s
50 m/s
60 m/s
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Relative speed = Speed of observer 1 + Speed of observer 2 = 20 m/s + 30 m/s = 50 m/s.
Questions & Step-by-step Solutions
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Q
Q: Two observers are moving towards each other at speeds of 20 m/s and 30 m/s. What is the speed of one observer as seen by the other?
Solution:
Relative speed = Speed of observer 1 + Speed of observer 2 = 20 m/s + 30 m/s = 50 m/s.
Steps: 5
Show Steps
Step 1: Identify the speeds of the two observers. Observer 1 is moving at 20 m/s and Observer 2 is moving at 30 m/s.
Step 2: Understand that when two objects are moving towards each other, their speeds add up to find the relative speed.
Step 3: Add the speed of Observer 1 (20 m/s) to the speed of Observer 2 (30 m/s).
Step 4: Calculate the total: 20 m/s + 30 m/s = 50 m/s.
Step 5: Conclude that the speed of one observer as seen by the other is 50 m/s.
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