Chapter 06 Lecture Slides
... 6.2.1. Which one of the following statements concerning the static and kinetic frictional forces is correct? a) When an object is stationary, both static and kinetic frictional forces are acting on it. b) When an object is stationary, only the kinetic frictional force acts on it. c) When an object ...
... 6.2.1. Which one of the following statements concerning the static and kinetic frictional forces is correct? a) When an object is stationary, both static and kinetic frictional forces are acting on it. b) When an object is stationary, only the kinetic frictional force acts on it. c) When an object ...
FORCES AND TORQUES IN EQUILIBRIUM
... All external torques on the object balance (so the net torque is zero]. Description of Apparatus In this experiment an object is suspended at rest with up to five forces acting on it; the object remains at rest. The magnitudes and directions of the forces are measured, and calculations are done to v ...
... All external torques on the object balance (so the net torque is zero]. Description of Apparatus In this experiment an object is suspended at rest with up to five forces acting on it; the object remains at rest. The magnitudes and directions of the forces are measured, and calculations are done to v ...
Misconceptions in Cosmology and how to correct them
... is only applicable to speeds very low as compared with light. Before the ‘big breed theory’, outlined above, could be quantified mathematically speeds up to that of light had to be included. The only theory available to cover this case was Einstein’s theory of special relativity. Consequently a stud ...
... is only applicable to speeds very low as compared with light. Before the ‘big breed theory’, outlined above, could be quantified mathematically speeds up to that of light had to be included. The only theory available to cover this case was Einstein’s theory of special relativity. Consequently a stud ...
Class - Educast
... A body is said to be in equilibrium if it is at rest or moving with uniform velocity. In other words if the linear and angular acceleration of a body are zero, the body is said to be in equilibrium. Or we can say that when two or more forces act on a body such that their resultant or combining effec ...
... A body is said to be in equilibrium if it is at rest or moving with uniform velocity. In other words if the linear and angular acceleration of a body are zero, the body is said to be in equilibrium. Or we can say that when two or more forces act on a body such that their resultant or combining effec ...
solutions for chapter 21 problems 4, 12, 19, 25, 33, 40, 50, 75, 89, 96.
... IDENTIFY: The net force on each charge must be zero. SET UP: The force diagram for the 6.50 C charge is given in Figure 21.40. FE is the force exerted on the charge by the uniform electric field. The charge is negative and the field is to the right, so the force exerted by the field is to the lef ...
... IDENTIFY: The net force on each charge must be zero. SET UP: The force diagram for the 6.50 C charge is given in Figure 21.40. FE is the force exerted on the charge by the uniform electric field. The charge is negative and the field is to the right, so the force exerted by the field is to the lef ...
Physics 1A, Lecture 15: Torque and Angular Momentum
... RotaFonal equilibrium • When pivot point is not fixed, even if net torque is zero, you can get translaFonal moFon when there is a net force. So you need to check both. ...
... RotaFonal equilibrium • When pivot point is not fixed, even if net torque is zero, you can get translaFonal moFon when there is a net force. So you need to check both. ...
Weightlessness
Weightlessness, or an absence of 'weight', is an absence of stress and strain resulting from externally applied mechanical contact-forces, typically normal forces from floors, seats, beds, scales, and the like. Counterintuitively, a uniform gravitational field does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force acceleration and feels weightless. This is also termed ""zero-g"" where the term is more correctly understood as meaning ""zero g-force.""When bodies are acted upon by non-gravitational forces, as in a centrifuge, a rotating space station, or within a space ship with rockets firing, a sensation of weight is produced, as the contact forces from the moving structure act to overcome the body's inertia. In such cases, a sensation of weight, in the sense of a state of stress can occur, even if the gravitational field was zero. In such cases, g-forces are felt, and bodies are not weightless.When the gravitational field is non-uniform, a body in free fall suffers tidal effects and is not stress-free. Near a black hole, such tidal effects can be very strong. In the case of the Earth, the effects are minor, especially on objects of relatively small dimension (such as the human body or a spacecraft) and the overall sensation of weightlessness in these cases is preserved. This condition is known as microgravity and it prevails in orbiting spacecraft.