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 someone is holding an object in her hand with her forearm horizontal and her upper arm vertical so her elbow creates a 90∘ angle. if her biceps attach to her forearm 0.0597 m from the elbow and make an angle of 29.0∘ with the vertical while a 2.00 kg mass is held in her hand 29.03 cm from the elbow, what force is exerted by the biceps muscle? ignore the mass of the forearm.
Answers: 1
Physics, 23.06.2019 03:00, cc14ty
Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2 . how much is the spring compressed x from its natural length?
Answers: 3
Physics, 23.06.2019 03:10, stotherow5
You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.
Answers: 2
Most of the motion generated by joints in the human body are examples of levers. an example of a thi...
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