Question

What is average speed along x axis if particle is moving in a circle in xy plane?

Answer 1

.

a. Speed

Distance = 200 m

Time = 10 s

Speed = 200/10 = 20 ms-1

b. Velocity = 0 as net displacement completing a circular track is 0.

2.

Average speed = total distance covered / total time taken

  = (10 + 20 + 30)/(5 + 10 + 10)

  = 60 / 25

  = 2.4 ms-1

3. Let the time taken = t 

Distance covered in completing ¾ of a circle = ¾×2πr

     = (3/2)πr  

 



 


 

Displacement = √(r2 + r2)

  = r√2

Distance / displacement = (3/2)πr  / (r√2)

    = (3/2)π/√2

Distance : displacement = (3/2)π : √2

4. 

Here

Speed = 36 kmph

Distance = speed× time

 

Distance travelled in 1 hr = 36×1 = 36 kmDistance travelled in 1 min = 36×1/60 = 0.6 km