Question
Question 51:
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be:
(a) + 2 m/s2
(b) − 2 m/s2
(c) − 0.5 m/s2
(d) + 0.5 m/s2
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Text solutionVerified
Answer:
(d) The term “retardation” means negative acceleration.
Initial velocity = 10 m/s
Final velocity = 0 m/s
Time taken = 20 s
Initial velocity = 10 m/s
Final velocity = 0 m/s
Time taken = 20 s
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Question 51:
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be:
(a) + 2 m/s2
(b) − 2 m/s2
(c) − 0.5 m/s2
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Question Text | Question 51:
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be: (a) + 2 m/s2 (b) − 2 m/s2 (c) − 0.5 m/s2 (d) + 0.5 m/s2 |
Updated On | Sep 4, 2022 |
Topic | Motion |
Subject | Science |
Class | Class 9 |
Answer Type | Text solution:1 Video solution: 2 |
Upvotes | 271 |
Avg. Video Duration | 5 min |