a person goes to hospital for vaccination of the covid-19 from his home with uniform speed of 20 metre per second state a hospital with the half hour and returns to home with uniform speed of the 10 metre per second the distance between the home and Hospital is find the average speed and the velocity of the entire journey will be respectively
Answers
Given : Goes from his home with uniform speed of 20 metre per second in the half hour and returns to home with uniform speed of the 10 metre per second
To Find : distance between the home and Hospital
average speed and the velocity of the entire journey
Solution:
Average Velocity = Displacement / Time
Average Speed = Distance / Time
Displacement = Final position - Initial Position
Person return back to original position
Hence Final position = Initial Position
=> Displacement = 0
Average Velocity = 0/time = 0
uniform speed of 20 metre per second
Time = half hour = 30 mins = 30 * 60 = 1800 sec
Distance = 20 * 1800 = 36000 m = 3.6 km
Speed in return = 10 m/s
Time = 36000/10 = 3600 secs
Total Distance = 36000 + 36000 = 72000 m
Total Time = 1800 + 3600 = 5400 sec
Average Speed = 72000/5400 = 720/54
= 40/3
= 13.33 m/s
Distance between the home and Hospital is 3.6 km
Average Velocity = 0
Average speed = 13.33 m/s
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