An athlete whose mass is 94.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 600 . He lifts the barbell a distance of 0.50 in a time of 2.2 .

Question

An athlete whose mass is 94.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 600 . He lifts the barbell a distance of 0.50 in a time of 2.2 .
Part A
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.

bobpursley · Answer

forcetotal=(hismass+barbellmass)g+barbellmass*acceleration what is barbell acceleration: changevelocity/time=2*distance/time