Complete the table below.
\begin{tabular}{|l|l|l|}
\hline Unit of Length & Unit of Time & Unit of Speed \\
\hline m & Sec & \\
km & hr & \\
m & min & \\
cm & hr & \\
\hline
\end{tabular}
Answer (2)
Divide the unit of length by the unit of time to find the unit of speed.
Row 1: meters / second = m/sec
Row 2: kilometers / hour = km/hr
Row 3: meters / minute = m/min
Row 4: centimeters / hour = cm/hr
The completed table is shown above with the units of speed in each row: m/sec, km/hr, m/min, cm/hr .
Explanation
Understanding the Problem We need to complete the table by finding the unit of speed for each row, given the units of length and time. The unit of speed is derived from the unit of length divided by the unit of time.
Calculating the First Unit of Speed For the first row, the unit of length is meters (m) and the unit of time is seconds (sec). Therefore, the unit of speed is meters per second, or m/sec.
Calculating the Second Unit of Speed For the second row, the unit of length is kilometers (km) and the unit of time is hours (hr). Therefore, the unit of speed is kilometers per hour, or km/hr.
Calculating the Third Unit of Speed For the third row, the unit of length is meters (m) and the unit of time is minutes (min). Therefore, the unit of speed is meters per minute, or m/min.
Calculating the Fourth Unit of Speed For the fourth row, the unit of length is centimeters (cm) and the unit of time is hours (hr). Therefore, the unit of speed is centimeters per hour, or cm/hr.
Final Answer The completed table is:
Unit of Length
Unit of Time
Unit of Speed
m
sec
m/sec
km
hr
km/hr
m
min
m/min
cm
hr
cm/hr
Examples
Understanding units of speed is crucial in everyday life. For example, when driving a car, the speedometer displays the speed in kilometers per hour (km/hr) or miles per hour (mph). Similarly, understanding meters per second (m/s) is important in physics when calculating the velocity of objects. Knowing these units helps us to quantify and compare how fast things are moving.
The unit of speed can be calculated by dividing the unit of length by the unit of time. The completed table includes m/sec, km/hr, m/min, and cm/hr as the units of speed for the respective measurements. This method helps quantify and compare how fast an object travels based on different units of length and time.
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