Physics, 07.02.2021 16:20 mariaherving55
A uniform plank rests on a pivot at its centre.
Two children P and Q sit on the plank in the positions shown.
1.2 m
1.5 m
child P
The mass of child P is 25 kg. The plank is balanced.
What is the mass of child Q? A 20kg B 25kg
pivot
child Q
D 45kg
C 31kg
Answers: 2
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A uniform plank rests on a pivot at its centre.
Two children P and Q sit on the plank in the positi...
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