The mass
Classical Mechanics
Level
3
A person has 60 kg mass. He pick up a box that has 30 kg mass. He walking slowly.
How many addition mass entring on his knee when he pick up the box and walk?
30 kg
70 kg
45 kg
60 kg
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1 solution
When I walking 3x of my weight entring on my knees. When a person has 60 kg and he walking. 60×3= 180 . We have two knee. 180÷2=90 for each knee
But now solution . 60+30: 90 90×3: 270 270÷2: 135 Now 135-90: 45