A uniform metre rule is pivoted at the 34.0 cm mark, as shown. The rule balances when a 64g mass is hung from the 4.0 cm mark.
What is the mass of the metre rule?
A 38g
B 44g
C 120g
D 136g
A man holds a 100N load stationary in his hand. The combined weight of the forearm and hand is 20N. The forearm is held horizontal, as shown.
What is the vertical force F needed in the biceps?
A 750N
B 800N
C 850N
D 900N
The diagram shows four forces applied to a circular object.
Which of the following describes the resultant force and resultant torque on the object?
A
B
C
D
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