Forces of Motion
... Force The students are pushing on the box in the same direction. These forces are combined, or added together, because they are exerted on the box in the same direction. The net force that acts on this box is found by adding the two forces together. ...
... Force The students are pushing on the box in the same direction. These forces are combined, or added together, because they are exerted on the box in the same direction. The net force that acts on this box is found by adding the two forces together. ...
a. 0 N.
... The reason a tennis ball and a solid steel ball will accelerate at the same rate, in the absence of air resistance, is that a. they have the same mass. b. the ball with the larger force has the smaller mass. c. the ball with the larger force also has the larger mass. d. the force acting on them is ...
... The reason a tennis ball and a solid steel ball will accelerate at the same rate, in the absence of air resistance, is that a. they have the same mass. b. the ball with the larger force has the smaller mass. c. the ball with the larger force also has the larger mass. d. the force acting on them is ...
Lab7_StaticEquilibrium
... on it is zero and thus the object is not accelerating. Of course, the word static implies that the object’s velocity is zero as well. This is fine for point particles, objects that do not have size. This is the approximation that we have been making so far in class. When you remove that approximatio ...
... on it is zero and thus the object is not accelerating. Of course, the word static implies that the object’s velocity is zero as well. This is fine for point particles, objects that do not have size. This is the approximation that we have been making so far in class. When you remove that approximatio ...
electric force, field, potential, and energy
... • the work that must be performed against gravitational forces to move an object from a reference point to the point in question, divided by the mass of the object ...
... • the work that must be performed against gravitational forces to move an object from a reference point to the point in question, divided by the mass of the object ...
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.