Question

PHYSICS

Answer 1

With an average acceleration of -1.2 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 6.5 m/s to a complete stop?

Answer 2

acceleration shows the rate at which velocity increases or decreases. And since the cyclist is traveling at 6.5m/s you just have to divide the preexisting velocity by the deceleration to get the time it takes for the cyclist to come to a stop. Alternatively you can use the equation below to better visualize what's happening in this question.
v(final)=v(initial)+at
where
v=velocity
a=acceleration
t=time

I hope this helps:)

0=6.5m/s-1.2m/s^2*(t)

Answer 3

\[a = \frac{ v_f - v_i }{ \Delta t }\]\[\Delta t = \frac{ v_f - v_i }{ a } = \frac{ 0-6.5 }{ -1.2 } = ?\]