CT15a
... Answer: The Hoop has the larger I about the pivot than the Disk, so the hoop has the longer period T. Ihoop, edge pivot = Icm + MR2 = MR2+MR2=2MR2, Idisk, edge pivot = (1/2) MR2+MR2=(3/2)MR2. On the moon, is the period different than on the Earth? A: longer on Moon B: shorter C: The periods are the ...
... Answer: The Hoop has the larger I about the pivot than the Disk, so the hoop has the longer period T. Ihoop, edge pivot = Icm + MR2 = MR2+MR2=2MR2, Idisk, edge pivot = (1/2) MR2+MR2=(3/2)MR2. On the moon, is the period different than on the Earth? A: longer on Moon B: shorter C: The periods are the ...
Monday, 5 September, Lecture 1, Introduction to Physics - RIT
... (1) A constant force of 3.75 N is applied to a hockey puck in the positive x-direction. (Note: A hockey stick remains in contact with the puck in order to apply the constant force.) The puck is initially at rest at the origin; its mass is .150 kg. Assume there is no friction between the puck and the ...
... (1) A constant force of 3.75 N is applied to a hockey puck in the positive x-direction. (Note: A hockey stick remains in contact with the puck in order to apply the constant force.) The puck is initially at rest at the origin; its mass is .150 kg. Assume there is no friction between the puck and the ...
Name: Gravitational, Electric and Magnetic Fields
... b. Earth is not a perfect sphere, and the distance to the centre varies. c. Earth is not a perfect sphere, the distance to the centre varies, and there is an inertial effect because of Earth’s rotation. d. Some surface features on Earth are denser than others and cause a greater effect on gravity in ...
... b. Earth is not a perfect sphere, and the distance to the centre varies. c. Earth is not a perfect sphere, the distance to the centre varies, and there is an inertial effect because of Earth’s rotation. d. Some surface features on Earth are denser than others and cause a greater effect on gravity in ...
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.