Question

an athlete running with uniform speed along a circular track of radius 42m complete one round in 40 seconds. calculate average speed and average velocity in time interval of (1) 0-10sec (2) 0-20sec (3) 0- 40sec

Answer 1

circumference of circle=2 pir

= 2*22/7*42

= 44*6

= 264m

now, speed= 264/40= 6.6m/s


1) Average spped between 0-10 sec= 264/4

= 66/10= 6.6m/s

&,, displacement ≈ 60m [using Pythagoras theorm]

so, velocity= 60/ 10=6m/s

2) Average speed between= 0-20 sec. =

264/2

= 132/20= 6.6m/s

& Averge velocity= 84/20= 4.2 m/s

3) Average speed between 0-40 sec.

= 264/40= 6.6m/s

& Aveage velocity= 0/40= 0m/s

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Answer 2

Answer:

an athlete running with uniform speed along a circular track of radius 42m complete one round in 40 seconds. calculate average speed and average velocity in time interval of (1) 0-10sec (2) 0-20sec (3) 0- 40sec

Explanation:

0/m/s