Shelley gives her little sister a 5-meter head start in a bike race. The race ends 15 meters east from where Shelley started. If her little sister completes the race in 5 seconds, what is her sister’s average velocity? (Round your answer to the nearest whole number.)
Answer:
The average velocity is 2 m/s.
Explanation:
Given data:
Distance covered during head start is, \(d_{1}=5 \;\rm m\).
Distance covered at the end of race is, \(d_{2}= 15\;\rm m \; (East)\).
Time taken is, \(t = 5 \;\rm s\).
The expression for the average velocity is,
\(v_{av.}=\dfrac{d_{2}-d_{1}}{t}\)
Substituting the values as,
\(v_{av.}=\dfrac{15-5}{5}\\v_{av.}=2 \;\rm m/s\)
Thus, the average velocity is 2 m/s.
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