Question

1. usain bolt ran the 100 metre in 9.58 seconds. work out his average speed in metres per second.

Explanation:

Step1: Recall the formula for average speed

The formula for average speed \( v \) is \( v=\frac{d}{t} \), where \( d \) is the distance traveled and \( t \) is the time taken.

Step2: Identify the values of distance and time

Here, the distance \( d = 100\) metres and the time \( t=9.58\) seconds.

Step3: Substitute the values into the formula

Substitute \( d = 100\) and \( t = 9.58\) into the formula \( v=\frac{d}{t}\), we get \( v=\frac{100}{9.58}\).

Step4: Calculate the value

\( \frac{100}{9.58}\approx10.44 \) (rounded to two decimal places).

Answer:

\( \approx10.44 \) metres per second