An athlete whose mass is 85.5 kg is performing weight-lifting exercises. Startin
ID: 2030037 • Letter: A
Question
An athlete whose mass is 85.5 kg is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 420 N . He lifts the barbell a distance of 0.70 m in a time of 1.1 s.
Use Newton's laws to find the total force that his feet exert on the ground as he lifts the barbell.
Assignments x7 MasteringPhysics: HW-Ch04e Two Forces, F? 1 And F? 2. A × e An Electron Of Mass 9.11x10 × e An Athlete whose Mass Is 8: x Ahmed C Secure https://session.masteringphysics.com/myct/itemView?assignmentProblemID-92578468 KHW-Ch04 Item 10 10 of 10 Constants Part A An athlete whose mass is 85.5 kg is performing weight- ifting exercises. Starting from the rest position, he lifts with constant acceleration, a barbell that weighs 420 N He lifts the barbell a distance of 0.70 m in a time of 1.1 s Use Newton's laws to find the total force that his feet exert on the ground as he lifts the barbell. Express your answer using two significant figures. Floor Submit Previous Answers Request Answer XIncorrect; Try Again Return to Assignment Provide FeedbackExplanation / Answer
The total force acting on the ground will be equal to = weight of the lifter + weight of the barbell = 85.5 x 9.81 + 420 N = 1258.76 N