Problem 6.2. The man performing the dumbbell kickbacks in Problem 6.1 wants to know how the rate of rotation of his forearm affects the ease of the exercise. So, he begins to raise his forearm from vertical to horizontal position as quickly as he can, still using the same weight. When his forearm makes 45° with the vertical axis, the angular velocity and angular acceleration of the forearm becomes 28 rad/s and 228 rad/s2, respectively. A minus sign associated with angular velocity refers to clockwise rotation of the right hand. Determine the force produced by the triceps at the elbow at the instant considered. Ic 5 0.021 kg-m2. FT 5 478 (N).
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Physics, 22.06.2019 00:00
True or false: the revolution of the earth creates day and night as it rotates around the sun
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Physics, 22.06.2019 09:40
Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.
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Physics, 22.06.2019 10:30
Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.
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Problem 6.2. The man performing the dumbbell kickbacks in Problem 6.1 wants to know how the rate of...
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