Question

Calculate the average speed of "Usain Bolt" who sprinted 100m in
9.81 sec during 2016 Rio Olympics to win Gold medal. SA - III : 2017
- The average speed of Usain Bolt:
(AS 6)
Distance covered
100 m.
Time taken
9.81 s.
Distance covered 100
Average speed
= 10.19 m/s.
Time taken
9.81
The average speed of Usain Bolt
10.19 m/s.
4 Mark Questions
What are the equations of motions ? Deduce the expressions (AS1)
The equations of motion are​

Answer 1

Answer:

35km per hour

it is a correct answer

Answer 2

The average speed of Usain Bolt is 10.19 m/s.

Given:

Usain Bolt sprinted 100m in 9.81 sec.

To find:

The average speed of "Usain Bolt"

Formula used:

Average Speed = Distance covered / Time taken

Step-by-step explanation:

Distance covered is given as 100 m.

Time taken to cover 100m distance is given as 9.81 s.

Average speed = Distance / Time

= 100 / 9.81

= 10.19 m/s.

Hence, the average speed of Usain Bolt is found to be 10.19 m/s.