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5 An athlete bends down and then jumps straight up into the air. At the instant he starts his jump three forces act on him – his weight, an upthrust from the air and the contact force with the
ground. What is the correct order in increasing magnitude of these three forces? [1]
A contact force → weight → upthrust
B upthrust → contact force → weight
C upthrust → weight → contact force
D weight → upthrust → contact force ANyone?...
ground. What is the correct order in increasing magnitude of these three forces? [1]
A contact force → weight → upthrust
B upthrust → contact force → weight
C upthrust → weight → contact force
D weight → upthrust → contact force ANyone?...