A driver is driving along at 80kmh (22m/s) and a kangaroo hops out onto the road 100m ahead. It takes the driver takes a half second to react (in which they keep moving at 22 m/s), and then the car can accelerate at 

For all numerical answers, give you result in SI units (m/s, m, s, etc). 

Before calculating anything, do you think they'll hit the kangaroo? Write down your answer off to the side where you'll do your working and save it.

Now, the first calculation: how long does it take the driver to stop in seconds?