Answer: a) 2.5 meter per second
b) 2.27 meter per second
c) 2.38 meter per second
Step-by-step explanation:
The formula to find average velocity is given by :-
[tex]\text{Average velocity}=\frac{\text{total distance}}{\text{total time taken}}[/tex]
a) The average velocity for the first half of the swim=[tex]\frac{50}{20}=2.5\ ms^{-1}[/tex]
b) The average velocity for the second half of the swim=[tex]\frac{50}{22}=2.27\ ms^{-1}[/tex]
c) The average velocity for the roundtrip=[tex]\frac{50+50}{20+22}=\frac{100}{42}=2.38\ ms^{-1}[/tex]
Answer:
a.2.5 m/s
b.2.27 m/s
c.2.38 m/s
Step-by-step explanation:
We are given that an athlete swims from the north end to south end of a pool 50 m.
a.We have to find the average velocity for the first half of the swim.
We are given displacement=50 m
Time=20 s
Average velocity=[tex]\frac{Displacement}{time}=\frac{50}{20}=2.5 m/s[/tex]
Hence, the average velocity=2.5 m/s.
b.Displacement =50 m
Time=22 s
We have to find the average velocity for the second half of the swim.
Average velocity=[tex]\frac{50}{22}=\frac{25}{11}=2.27 m/s[/tex]
Hence,the average velocity=2.27 m/s
c.We have to find the average velocity for the roundtrip
Average velocity for the roundtrip=Mean of average velocity for the first half and average velocity for the second half
Average velocity for the roundtrip=[tex]\frac{2.5+2.27}{2}=2.38 m/s[/tex]
Hence, the average velocity for roundtrip=2.38 m /s
