The speed of the body is 3m/s in the first 10 seconds and 6m/s in the next 5 seconds. Find the average speed of the body.
Answers
Answered by
1
Answer:
Let the total distance = 3x,
The travel takes place in 3 parts:
x distance at 2ms
−1
x distance at 3ms
−1
x distance at 6ms
−1
The time taken in each individual travel is:
t
1
=
2
x
t
2
=
3
x
t
3
=
6
x
Hence the total time taken is :
t
1
+t
2
+t
3
=x
Total distance travelled = 3x
Average velocity =
x
3x
=3ms
−1
Hence option A is correct.
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