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A 35 N hand and forearm are held at a 45 degree angle to the vertically oriented humerus. The CG of the forearm and hand is located at a distance of 15 cm from the joint center at the elbow, and the elbow flexor muscles attach at an average distance of 3 cm from the joint center. (Assume that the muscles attach at an angle of 45 degrees to the bones).
a.) how much force must be exerted by the forearm flexors to maintain this position?
b.) how much force must the forearm flexors exert if a 50 N weight is held in the hand at a distance along the arm of 25 cm?
The scale of a spring balance reading from 0 to 230 N has a length of 15.0cm. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.40 Hz. What is the mass of the fish ignoring the mass of the spring.
Consider three point charges located at the corners (points 1, 2, and 3) of a right triangle with sides "a", where q1 is located at corner 1, q2 at corner 2, and q3 at corner 3, Find the resultant force exerted on q3
What is the velocity of 5.5kg object with a force of 2.5N while it reaches 6.0 meters, assuming the velocity at zero meters is zero.
Suppose that the light is incident at right angles to the film. what is the minimum distance from the slits to the screen when 580 nm light is used.
A car travels at a constant speed around a circular track whose radius is 2.51 km. What is the magnitude of the centripetal acceleration of the car
When the walkway exerts a load force of 9900 N on one of the support points, through what distance does the point move down?
A whale comes to the surface to breathe and then dives at an angle of 20 degree below the horizontal.
what volume should the balloon have after being inflated. Billiard ball A of mass mA=0.400kg moving with speed vA=1.80m/s strikes ball B, initially at rest of mass mB=0.500kg. As a result of collision, ball A is deflected off at an angle of 30.0 deg..
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and final states 1 and 2
A worker pulls horizontally on a crate on a rough horizontal floor, causing it to move forward with constant velocity. In the figure, force is the pull of the worker and force is the force of friction due to the floor.
A 200g mass on the end of a spring is pulled back 3 cm and released. There is a coefficient of friction between the table and mass of 0.7. The resonant frequency is 7.071 rad/sec.
A dead tree is initially stationary and there is a 30.0-degree angle between the tree and the vertical. The roots finally give way and the tree topples to the ground (rotating on an axis that is parallel to the level ground and intersecting the ba..
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