Question

You're driving at speed v_0 when you spot a stationary moose on the road, a distance d ahead. Find an expression for the magnitude of the acceleration you need if you're to stop before hitting the moose. Please explain thanks.

Answer 1

you can use the equation
\[v _{f}^{2}=v _{0^{}}^{2} + 2a \delta x\] where delta x = d, the final velocity = 0, from there you can write an expression for acceleration. It should look like \[(v _{f}^{2}- v _{0^{}}^{2})/2 \delta x = a\]