Aboy walks a distance of 100 meters to the right at a steady speed of 1.00 m/s. then he stops for 30 seconds. then returns back and walks for 2 minutes to the left at speed of 1.5m/s.
calculate the total time of his round trip.
calculate the total distance.
calculate the total displacement.
calculate the average speed.
calculate the average velocity

Explanation:

In the figure attached:

A boy travels AB distance of 100 m, with speed of 1.00 m/s

AB = 100 m

After reaching at point B he stops there at for 30 seconds.

After , 30 seconds he he comes back to his initial position that is A with steady speed of 1.00 m/s.

Distance covered from B to A= 100 m

Time taken by him during coming back=

After returning to to point A he turns left and moves towards point C with speed of 1.5 m/s for 2 minutes.

Distance of AC = ?

AC = 180 m

The total time of his round trip is:T

The total distance: D

D = AB + BA (returning) + AC=100 m + 100 m + 180 m = 380 m[/tex]

The total displacement of boy:

Displacement is the shortest distance between the initial point and final point.

He first walked to point B from A and then came back to A . And after that walking to point C from A.So, the final displacement (d) is from A to C.

d = AC = 180 m

The total displacement of boy is 180 m.

The average speed of the boy is given by:

The average velocity of the boy is given by:

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

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