An athlete with a mass of 70 kg is performing a barbell backsquat exercise with a load of 150 kg. From the starting position(position A), the athlete stands still prior to lowering their COMin the negative vertical direction at a rate of -1.45m/s2 (position B). Once they reach the bottom position,they hold the squat for 3 seconds (e.g. 0 m/s2 –position C). After the 3 second period, the athlete raises theirCOM in the positive vertical direction at a rate of 2.55m/s2 (position D) back to the starting position. Solvefor the net force at each position to allow the athlete to achievethe respective accelerations during the barbell back squatlift.
- Starting Position (position A):____________________________
- Lowering COM (position B): _____________________________
- Holding at bottom for 3 seconds (position C):______________________________________
- Raising the COM to starting position (position D):___________________________
