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Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; the force which generates the motion is located in between the pivot point and the resistance force. The elbow acts as the pivot point, the biceps muscle pulls up on the forearm to move the mass which is held in the hand. Imagine you are holding an object in your hand with your forearm horizontal and your upper arm vertical so your elbow creates a 90° angle. If your biceps attach to your forearm 0.0597 m from the elbow and make an angle of 26.0° with the vertical while a 2.38 kg mass is held in your hand 29.03 cm from the elbow, what force is exerted by the biceps muscle? Ignore the mass of the forearm.
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.05 cm, and a -2.42 µC charge is located at y = -1.30 cm. Find the total electric potential at the origin
Suppose that you wish to fabricate a uniform wire out of 0.850 g of copper. Assume the wire has a resistance R = 0.600 ?, What will be the diameter of the wire
Find the difference of the initial and the final masses for the decay 137N?126C+p. The atomic masses of 137N, 126C,
a 26.5 kg boy slides down a steep slide at a water park that is 10.9 m long and angled 75 degrees above the ground. what is the magnitude of the boys acceleration as he travels down the slide
A bullet with mass 5.06 g is fired horizontally into a 2.038-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
Consider a conical pendulum with a bob of mass m=82.0 kg on a string of length L=10.0 m that makes an angle of theta=8.00 degrees with the vertical, Determine the radical acceleration of the bob.
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
An electric charge is uniformly distributed throughout a 12cm radius non conducting sphere. what is the volume charge density of the sphere
We're doing a buoyancy lab and this equation is derived using the apparent mass of a sinker, calculate the density of the cylinder of wood
If a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a postive charge? How does the potential energy of teh charge change in each instance?
does the level of social responsibility exhibited by starbucks have any effect on how other coffee retailers are
a carnot engine whose low-temperature reservoir is at 17.7degc has an efficiency of 29.2. by how much should the
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