For this problem, we're asked to find the time taken by an accelerating object to reach target speed.
When solving problems with uniformly accelerated motion (UAM), Step Zero is making sure that the acceleration is constant—otherwise, our kinematics equations don’t apply. Then we'll follow these steps to solve the problem:
The four UAM (kinematics) equations are:
The head of a rattlesnake can accelerate at 50m/s2 in striking a victim. If a car could do as well, how long would it take to reach a speed of 100km/h from rest?