A volleyball player spikes the ball. At the instant that she begins to extend her shoulder to bring her arm forward, her shoulder is in 225° of flexion. She contacts the ball 120 ms later with her shoulder in 160° of flexion and extending at 700°/s. 100 ms later, at the end of her follow-through, her shoulder stops extending at a flexion angle of 135°.  What was the average angular acceleration at the shoulder: (i) before ball contact and… (ii) after ball contact?

Q: The uniform rod (length 0.7 m) in figure rotates about an axis through one end, with a rotational…

A: Given Data⇒ Length of the uniform rod is L=0.7 m Rotational inertia of uniform rod is I=0.13 kg-m2…

Q: Question 2: A bead M slides without friction on a rigid wire (T). This rigid wire rotates around the…

A: Solution-:  As given that angular velocity of wire is constant. W=Wk

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Q: Bar AB is connected to a pin at A anf forms at the moment of study an angle of 31° with the…

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Q: The power of an engine running at 125 rpm is turned off and the engine comes to rest at the end of 2…

A: The given information in the problem is listed in the following attached image:

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Q: The device in the figure, B and C are pins, the center disk C rolls without sliding on the contact…

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Q: 5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with…

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Q: Part B As shown, a cam has a shape that is described by the function - 7o (2.00- cos ), where = 1.14…

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Q: 4 in. - 16 in. P M. Lr=1 in.

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Q: A pulley starting from rest and it rotates 2.5 revolutions in 0.3 sec. The estimated final angular…

A: no. of revolution =2.5 radian in 0.3sec =2.5(2(3.14))=15.7 radian

Q: 5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with…

A:

Q: 5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with…

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Q: Q2) In a'Tour-bar chain ABCD, AD is fixed and is 65 mm long. The crank AB is 25mm long and rotates…

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Q: The crank, connecting rod and cross head of a stationary steam engine are shown diagrammatically in…

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Q: 5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with…

A: Write the given data. ω=5.4 rad/sα=7.8 rad/s2l=2.1 mθ=30°

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A:

Q: 4. A weight, attached to a cord, is travelling on a smooth circular table. A cord is pulling the…

A: The given data with the suitable variables is shown below. vr=5 cm/sθ˙=10 rad/saθ=0r=20 cm

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Q: 5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with…

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Q: a) A flywheel with a diameter of 356 mm accelerates uniformly from rest at a rate of 2.5 rad/s? for…

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Q: 5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with…

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Q: 1. When an airplane touches down at t = 0, a stationary wheel is subjected to a constant angu- lar…

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Q: A man is about to throw a stone by rotating his fully extended arm. If the stone moves at v = 2 due…

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Q: Need the answer in 15 minutes, please. Crank AB is 0.500 m long and is rotating counterclockwise at…

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.