PhysicsNotes QRECT Video Version With MetaNumber Feb 19 2013.pdf
... 4.4 Resolution of forces & their vector nature ............................................................................................. 12 4.5 More difficult problems with forces....................................................................................................... 12 5 Uniform ...
... 4.4 Resolution of forces & their vector nature ............................................................................................. 12 4.5 More difficult problems with forces....................................................................................................... 12 5 Uniform ...
Imagine a universe where the force of gravity is repulsive, not
... scalar quantity associated with it. In this case, it’s temperature. ...
... scalar quantity associated with it. In this case, it’s temperature. ...
幻灯片 1
... The acceleration of the particle measured by an observer in one frame of reference is the same as that measured by any other observer moving with constant velocity relative to the ...
... The acceleration of the particle measured by an observer in one frame of reference is the same as that measured by any other observer moving with constant velocity relative to the ...
Linear Impulse and Momentum
... body center of mass (TBCM) was 0.0 m/s at time 1, determine the horizontal velocity at take-off (time 2). 12. Determine the horizontal force applied to a 1.0 kg ball from time 1 to time 2, given that at time 1, the velocity is –10.0 m/s s and 0.05 s later the horizontal velocity is 50.0 m/s. Ignore ...
... body center of mass (TBCM) was 0.0 m/s at time 1, determine the horizontal velocity at take-off (time 2). 12. Determine the horizontal force applied to a 1.0 kg ball from time 1 to time 2, given that at time 1, the velocity is –10.0 m/s s and 0.05 s later the horizontal velocity is 50.0 m/s. Ignore ...
ch02 equilibrium and forces 2012
... on each of the scales? What happens when you stand with more of your weight on one foot than the other? Answer: In the first case, the reading on each scale is half your weight. In the second case, if you lean more on one scale than the other, more than half your weight will be read on that scale bu ...
... on each of the scales? What happens when you stand with more of your weight on one foot than the other? Answer: In the first case, the reading on each scale is half your weight. In the second case, if you lean more on one scale than the other, more than half your weight will be read on that scale bu ...
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.