Question

In the figure, a 17 kg block is held in place via a pulley system. The person's upper arm is vertical; the forearm makes angle \( \theta=31^{\circ} \) with the horizontal. Forearm and hand together have a mass of 1.8 kg , with a center of mass at distance \( d_{1}=13 \mathrm{~cm} \) from the contact point of the forearm bone and the upper-arm bone (humerus). The triceps muscle pulls vertically upward on the forearm at distance \( d_{2}=2.5 \mathrm{~cm} \) behind that contact point. Distance \( d_{3} \) is 33 cm . Take the upward direction to be positive. What are the forces on the forearm from (a) the triceps muscle and (b) the humerus? (a) Number i i Units N (b) Number \( \square \) Units \( \square \) N

          In the figure, a 17 kg block is held in place via a pulley system. The person's upper arm is vertical; the forearm makes angle \( \theta=31^{\circ} \) with the horizontal. Forearm and hand together have a mass of 1.8 kg , with a center of mass at distance \( d_{1}=13 \mathrm{~cm} \) from the contact point of the forearm bone and the upper-arm bone (humerus). The triceps muscle pulls vertically upward on the forearm at distance \( d_{2}=2.5 \mathrm{~cm} \) behind that contact point. Distance \( d_{3} \) is 33 cm . Take the upward direction to be positive. What are the forces on the forearm from (a) the triceps muscle and (b) the humerus?
(a) Number
i
i
Units
N
(b) Number \( \square \) Units \( \square \) N

In the figure, a 17 kg block is held in place via a pulley system. The person's upper arm is vertical; the forearm makes angle θ=31^∘ with the horizontal. Forearm and hand together have a mass of 1.8 kg , with a center of mass at distance d1=13 cm from the contact point of the forearm bone and the upper-arm bone (humerus). The triceps muscle pulls vertically upward on the forearm at distance d2=2.5 cm behind that contact point. Distance d3 is 33 cm . Take the upward direction to be positive. What are the forces on the forearm from (a) the triceps muscle and (b) the humerus?
(a) Number
i
i
Units
N
(b) Number □ Units □ N

Added by John J.

Question

Please give Ace some feedback