Final answer:
To find the drag racer's final velocity, we calculate the acceleration from the distance traveled and time, then apply this to find the velocity using kinematic equations.
Step-by-step explanation:
The question involves calculating the final velocity of a drag racer using the principles of kinematics in physics. The drag racer starts from rest and travels 400 m in 3 s, which is a motion problem involving constant acceleration. To find the final velocity (v), we can use the formula v = u + at, where u is the initial velocity, a is the acceleration, and t is time.
- First, we find the acceleration (a) using the distance formula s = ut + 1/2 at^2, where s is 400 m, and u is 0 since the racer starts from rest.
- Using the values given and solving for a, we find the drag racer's acceleration.
- Finally, we calculate the final velocity using the acceleration and the time of 3 s.