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An object travels 20 m in 5 sec and then another 40 m in 5 sec. What is the average speed of the object?
- a)6 m/s
- b)2 m/s
- c)12 m/s
- d)0 m/s
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
An object travels 20 m in 5 sec and then another 40 m in 5 sec. What i...
Average speed= (Total Distance)/(Total time)
= (20 m + 40 m)/(5 sec + 5 sec)
=60 m/10 sec
=6m/s
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An object travels 20 m in 5 sec and then another 40 m in 5 sec. What i...
Solution:
Given, the distance travelled by the object in the first 5 seconds = 20 m
And the distance travelled by the object in the next 5 seconds = 40 m
To find: The average speed of the object.
We know that the formula to calculate the speed of an object is:
Speed = Distance / Time
Using the formula for the first 5 seconds:
Speed1 = Distance1 / Time1 = 20 m / 5 s = 4 m/s
Using the formula for the next 5 seconds:
Speed2 = Distance2 / Time2 = 40 m / 5 s = 8 m/s
Now, to find the average speed of the object, we add the total distance travelled and divide it by the total time taken:
Total distance travelled = Distance1 + Distance2 = 20 m + 40 m = 60 m
Total time taken = Time1 + Time2 = 5 s + 5 s = 10 s
Average speed = Total distance travelled / Total time taken = 60 m / 10 s = 6 m/s
Therefore, the average speed of the object is 6 m/s, which is option (a).
Given, the distance travelled by the object in the first 5 seconds = 20 m
And the distance travelled by the object in the next 5 seconds = 40 m
To find: The average speed of the object.
We know that the formula to calculate the speed of an object is:
Speed = Distance / Time
Using the formula for the first 5 seconds:
Speed1 = Distance1 / Time1 = 20 m / 5 s = 4 m/s
Using the formula for the next 5 seconds:
Speed2 = Distance2 / Time2 = 40 m / 5 s = 8 m/s
Now, to find the average speed of the object, we add the total distance travelled and divide it by the total time taken:
Total distance travelled = Distance1 + Distance2 = 20 m + 40 m = 60 m
Total time taken = Time1 + Time2 = 5 s + 5 s = 10 s
Average speed = Total distance travelled / Total time taken = 60 m / 10 s = 6 m/s
Therefore, the average speed of the object is 6 m/s, which is option (a).
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