Physics, asked by candycanepiya, 1 month ago

Joseph jogs from one end A to the other end B of a straight 30 m road in 20 seconds and then turns around and jogs 100m back to point C in another 10sec. what are joseph's average speeds and velocities in jogging from A to C.​

Answers

Answered by itzsilentkiller234
6

Explanation:

Let us first understand what is meant by average speed and average velocity.

Average speed of a body is defined as the total distance covered by the body divided by the total time taken by the body to cover this distance.

Average velocity of a body is defined as the net displacement of the body divided by the total time taken by the body.

(a) It is given that Joseph jogs on a straight road of 300m in a time interval of 2 minutes and 30 seconds, which is equal to 150seconds150seconds. Therefore, when Joseph jogs from point A to point B, he covers a distance of 300m in time of 150seconds150seconds.Hence, his average speed is 300m150s=2ms−1300m150s=2ms−1.Since it is a straight road and he jogs in a single direction in this case, his displacement is equal to 300m.

Hence, his average velocity is 300m150s=2ms−1300m150s=2ms−1.

(b) Then it is given that he turns back and points B and jogs on the same road but in the opposite direction for a time interval for 1 minute and covers a distance of 100m.If we consider the whole motion of Joseph, i.e. from point A to point C, then he covers a total distance of 300m+100m=400m300m+100m=400m. And he covers this total distance in a time interval of 2.5min+1min=3.5min=210s2.5min+1min=3.5min=210s.

Therefore, his average speed for this journey is 400m210s=1.9ms−1400m210s=1.9ms−1.

For the same journey is displacement is equal to the distance between the points A and C,i.e. 300m−100m=200m300m−100m=200m.

Hence, his average velocity for this case is 200m210s=0.95ms−1200m210s=0.95ms−1.

Note: The distance covered by a body is the total length of the route by which the body travels. It is just a magnitude.Displacement of a body is a vector joining the initial position and the final position of the body. Its magnitude is equal to the length of the line segment joining the initial and final positions.

Answered by RedCream28
9

Answer:

Thank u so much piyu♡

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