In this article, (and video above), we calculate the velocity of a falling ball. A question on this topic would typically be found in the Dynamics section of the FE Exam and therefore will give you a better understanding of what you can expect during the exam. This week’s problem was created and solved by Enrique Ivers, an Engineer in Training.
The velocity (in m/s) of a falling ball is described by the equation:
What is the acceleration at time t=2s?
Recall that acceleration is the derivative of acceleration with respect to time. We are given the equation for velocity:
To find the equation for acceleration with respect to time, we take the derivative:
The correct answer is C.
This Episode Is Brought to You by PPI
PPI has helped engineers achieve their licensing goals since 1975. Passing the FE and PE exams can open doors to career advancement and new opportunities. Check out PPI’s wide range of prep options, including Live Online courses, OnDemand courses, and digital study tools to help prepare you to pass your licensing exam here.
I hope you found this week’s FE Environmental engineering exam prep question helpful. In upcoming articles, I will answer more FE Exam questions and run through more practice problems. We publish videos bi-weekly on our Pass the FE Exam YouTube Channel. Be sure to visit our page here and click the subscribe button as you’ll get expert tips and tricks – to ensure your best success – that you can’t get anywhere else. Believe me, you won’t want to miss a single video.
Lastly, I encourage you to ask questions in the comments of the videos or here on this page and I’ll read and respond to them in future videos. So, if there’s a specific topic you want me to cover or answer, we have you covered.
I’ll see you next week.
Anthony Fasano, P.E.
Engineering Management Institute
Author of Engineer Your Own Success