Conceptual Physics
velocity decreases. In contrast, pulling the weights close in to her body decreases her moment of inertia and increases her angu ...
10.13 - Summary Torque is a force that causes rotation. Torque is a vector quantity with units N·m. An object's moment of inerti ...
Chapter 10 Problems Conceptual Problems C.1 (a) Can an object have an angular velocity if there is no net torque acting on it? ( ...
4.20 kg and it exerts a force tangent to the edge of the pulley. What is the angular acceleration of the pulley? rad/s^2 2.2 A s ...
ornament's center. If the ornament has mass 0.0074 kg and radius 0.036 m, what is its moment of inertia for an axis that passes ...
Section 9 - Angular momentum of a rigid body 9.1 A thin rod 2.60 m long with mass 3.80 kg is rotated counterclockwise about an a ...
11.0 - Introduction Although much of physics focuses on motion and change, the topic of how things stay the same í equilibrium í ...
11.2 - Sample problem: a witch and a duck balance Since the system is stationary, it is in static equilibrium. This means there ...
Step-by-step solution We use the fact that the torques sum to zero to solve this problem. There are only two torques in the prob ...
Where is the center of gravity? Put the origin at center of gold ball: xCG = xCG = (8.4 + 29.9) / 66 xCG = 0.58 m from center of ...
11.5 - Elasticity Elastic: An elastic object returns to its original dimensions when a deforming force is removed. In much of ph ...
stress to strain. It differs by material, and depends upon what kind of stress is applied. Values for modulus of elasticity appl ...
F = force A = cross-sectional area Y = Young’s modulus (N/m^2 ) ǻL = change in length L i= initial length How much does this alu ...
11.8 - Volume stress Volume stress: A stress that acts on the entire surface of an object, changing its volume. Tensile stress r ...
P = pressure (force per unit area) B = bulk modulus (N/m^2 ) V = volume Pressure units: pascals (Pa = N/m^2 ) The increase in wa ...
11.9 - Interactive checkpoint: stress and strain A 3.50 meter-long rod, composed of a titanium alloy, has a cross-sectional area ...
Chapter 11 Problems Conceptual Problems C.1 The sketch shows a rod divided into five equal parts. The rod has negligible mass an ...
C.5 Suppose you have four rods made of four different materials-aluminum, copper, steel and titanium. They all have the same dim ...
1.8 The sketch shows a mobile in equilibrium. Each of the rods is 0.16 m long, and each hangs from a supporting string that is a ...
wheels is 0.85 m, how far is her center of gravity from the front wheels? Ignore the weight of this rather long skateboard. m 3. ...
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