Question

a car covers a distance of 112.6 km in 1.8 h. what is its speed in meters per second? a) 17.5 m/s b) 63 m/s c) 17 m/s d) 1.04 m/s

Explanation:

Step1: Convert distance to meters

We know that \(1\space km = 1000\space m\), so for a distance of \(112.6\space km\), we convert it to meters by multiplying by \(1000\).
\(112.6\space km\times1000 = 112600\space m\)

Step2: Convert time to seconds

We know that \(1\space h=3600\space s\), so for a time of \(1.8\space h\), we convert it to seconds by multiplying by \(3600\).
\(1.8\space h\times3600 = 6480\space s\)

Step3: Calculate speed

Speed is given by the formula \(v=\frac{d}{t}\), where \(d\) is distance and \(t\) is time.
Substituting \(d = 112600\space m\) and \(t=6480\space s\) into the formula:
\(v=\frac{112600}{6480}\approx17.5\space m/s\)

Answer:

A) 17.5 m/s