A client lifts a 30-pound kettlebell 2 feet during each repetition. How much work has she performed if she does 5 sets of 8 repetitions?
Practise this ACSM CPT Personal Train Prep question free, then download the PDF, watch the video walkthrough, or unlock timed mock exams for the full web bank.
✓ Correct answer: A. 2,400 lb.ft.Answer: 2,400 lb.ft. Mechanical work is the magnitude of a force that creates a change in position, and the linear displacement (straight-line distance) defines the change in position. Total mechanical work can be calculated with the formula $$W = (F \times d) \times r \times s$$. - F equals force - d equals distance - r equals repetitions - s equals sets In this example, $$W = (30 \ \text{lb.} \times 2 \ \text{ft.}) \times 8 \times 5 = 2,400 \ \text{lb.ft.}$$
Keep practising. Use the free ACSM CPT Personal Train Prep PDF, watch the YouTube walkthrough, or unlock all 10 web questions with timed mock exams.
Free practice here. Timed mocks when you are ready.
Study the ACSM CPT Personal Train Prep free question explanations, download the PDF, then unlock timed mock exams on the web when you want exam-day practice.
Theory