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An athlete swims the length of 50 m pool...

An athlete swims the length of `50 m` pool in `20 s` and makes the return trip to the starting position in `22 s`, Determine his averge velocity in
a. The first half of the swim
b. The second half of the swim
c. The round trip.

Text Solution

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a. `v_(av_(1)) =(50)/(20) =2.5 m s^(-1)`,
b. `v_(av_(2)) =(50)/(22) =2.27 m s^(-1)`
c. `v_(av)` is zero for round trip because displacement is zero.
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CENGAGE PHYSICS-KINEMATICS-1-Exercise 4.1
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  2. Say Yes or No: a. Can an object moving towards north have accelerati...

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  3. Can a body have a. Zero instantaneous velocity and yet be accelerati...

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  4. A body moves at a speed of 100 ms^(-1) for 10 s and then moves at a sp...

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  5. A body moves in the southern direction for 10 s at the speed of 10 ms^...

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  6. A car trvelling at 108 km h^(-1) has its speed reduced to 36 km h^(-1)...

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  7. A car starts form rest and accelerates uniformly for 10 s to a velocit...

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  8. A body covera 10 m in the seconds second and 25 m in finfth second of ...

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  9. A body moving with uniform acceleration a stratght line describes 25 m...

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  10. Two trains, each of length 100 m moveing in opposite direction along p...

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  11. Shows a particle starting from point A,travelling up to B with a speed...

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  12. A particle moving in a straight line covers half the distance with spe...

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  13. Find the ratio of the distance moved bya free-falling body from rest i...

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  14. Two balls of different masses (one lighter and other heaver) are throw...

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  15. A car runs at a constant speed on a circular track of radius 200 m, ta...

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  16. A train accelerates from at the constant rate b for time t(2) at a con...

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  17. An athlete swims the length of 50 m pool in 20 s and makes the return ...

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