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A body goes from A to B with a velocity of 20 m/s and comes back B to A with a velocity of
30 m/s. The average velocity of the body during the whole journey is
30 m/s. The average velocity of the body during the whole journey is
- a)zero
- b)25 m/s
- c)24 m/s
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
A body goes from A to B with a velocity of 20 m/s and comes back B to ...
Answer is zero
because displacement=0 and time =20 and 30 m/s so the formula of velocity=displacement/time taken
and there are sisplacement is zero in both cases .so when we divide any number with zero the answer will come zero .
because displacement=0 and time =20 and 30 m/s so the formula of velocity=displacement/time taken
and there are sisplacement is zero in both cases .so when we divide any number with zero the answer will come zero .
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Community Answer
A body goes from A to B with a velocity of 20 m/s and comes back B to ...
The average velocity of an object is defined as the total displacement divided by the total time taken. In this particular scenario, the body travels from point A to point B with a velocity of 20 m/s and returns from point B to point A with a velocity of 30 m/s.
To calculate the average velocity, we need to determine the total displacement and the total time taken for the entire journey.
- Total Displacement:
The displacement is the change in position of an object. As the body moves from A to B and then back from B to A, the total displacement is zero. This is because the body returns to its original position, resulting in no net change in position.
- Total Time Taken:
To calculate the total time taken, we need to consider the time taken for both the forward and backward journeys. Let's assume that the time taken for the forward journey is t1 and the time taken for the backward journey is t2.
Since velocity is defined as the displacement divided by time, we can write the equations:
20 m/s = Displacement / t1
30 m/s = Displacement / t2
As we determined earlier, the displacement is zero. Therefore, both t1 and t2 are also zero.
- Average Velocity:
Now, using the formula for average velocity, we have:
Average Velocity = Total Displacement / Total Time Taken
Since both the total displacement and total time taken are zero, the average velocity of the body during the whole journey is also zero.
Therefore, the correct answer is option 'A', zero.
To calculate the average velocity, we need to determine the total displacement and the total time taken for the entire journey.
- Total Displacement:
The displacement is the change in position of an object. As the body moves from A to B and then back from B to A, the total displacement is zero. This is because the body returns to its original position, resulting in no net change in position.
- Total Time Taken:
To calculate the total time taken, we need to consider the time taken for both the forward and backward journeys. Let's assume that the time taken for the forward journey is t1 and the time taken for the backward journey is t2.
Since velocity is defined as the displacement divided by time, we can write the equations:
20 m/s = Displacement / t1
30 m/s = Displacement / t2
As we determined earlier, the displacement is zero. Therefore, both t1 and t2 are also zero.
- Average Velocity:
Now, using the formula for average velocity, we have:
Average Velocity = Total Displacement / Total Time Taken
Since both the total displacement and total time taken are zero, the average velocity of the body during the whole journey is also zero.
Therefore, the correct answer is option 'A', zero.
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A body goes from A to B with a velocity of 20 m/s and comes back B to A with a velocity of30 m/s. The average velocity of the body during the whole journey isa)zerob)25 m/sc)24 m/sd)none of theseCorrect answer is option 'A'. Can you explain this answer?
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