motion and newton`s laws combined
... object at rest will stay at rest, and an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced force. 2nd Law – Force equals mass times acceleration. 3rd Law – For every action there is an equal and opposite reaction. ...
... object at rest will stay at rest, and an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced force. 2nd Law – Force equals mass times acceleration. 3rd Law – For every action there is an equal and opposite reaction. ...
Slide 1
... 4: A 10 kg package is swinging in a vertical circle of radius 5.0 m at the end of a rope. If the ac is 5.0 m/s2, a. Sketch the free body diagram at the bottom of the loop. b. what is the tension in the rope when the package is at the bottom of the loop? ...
... 4: A 10 kg package is swinging in a vertical circle of radius 5.0 m at the end of a rope. If the ac is 5.0 m/s2, a. Sketch the free body diagram at the bottom of the loop. b. what is the tension in the rope when the package is at the bottom of the loop? ...
Chapter 5
... Apparent weight and apparent weightlessness • When a passenger with mass m rides in an elevator with yacceleration ay, a scale shows the passenger’s apparent weight to be n = m∙(g + ay) • When the elevator is accelerating upward, ay is positive and n is greater than the passenger’s weight w = ...
... Apparent weight and apparent weightlessness • When a passenger with mass m rides in an elevator with yacceleration ay, a scale shows the passenger’s apparent weight to be n = m∙(g + ay) • When the elevator is accelerating upward, ay is positive and n is greater than the passenger’s weight w = ...
3 5-1 Kinematics of Uniform Circular Motion
... Every particle in the universe attracts every other particle This force acts along the line joining the two particles ...
... Every particle in the universe attracts every other particle This force acts along the line joining the two particles ...
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.