Answer:
The initial velocity of the motorcycle is 18.29 m/s.
Explanation:
Given that,
When a motorcycle hits the brakes, its final speed becomes zero.
Acceleration of the motorcycle, [tex]a=-6.42\ m/s^2[/tex]
Time taken to stop, t = 2.85 s
We need to find the initial velocity of the motorcycle. The first equation of kinematics is given by :
[tex]v=u+at\\\\-u=at\\\\u=6.42\times 2.85\\\\u=18.29\ m/s[/tex]
So, the initial velocity of the motorcycle is 18.29 m/s.
