Forces Review Powerpoint
... friction, a moving object will continue moving even if there is no force acting on it. ...
... friction, a moving object will continue moving even if there is no force acting on it. ...
Proficiency Review
... A transformer is a device in which alternating current in one coil of wire induces a current in a second coil. Which of the following properties is necessary for a transformer to work? A. When a magnetic field changes an electric current will be induced. B. Magnets are needed for an electrical curre ...
... A transformer is a device in which alternating current in one coil of wire induces a current in a second coil. Which of the following properties is necessary for a transformer to work? A. When a magnetic field changes an electric current will be induced. B. Magnets are needed for an electrical curre ...
PPT - Ascension
... change in the motion of a body is directly proportional to its mass and the rate of change in its velocity. Acceleration is a change in velocity with respect to time. It can be either an increase or decrease in velocity ...
... change in the motion of a body is directly proportional to its mass and the rate of change in its velocity. Acceleration is a change in velocity with respect to time. It can be either an increase or decrease in velocity ...
Lecture 14
... PHYSICS 151 – Notes for Online Lecture #14 In this lecture we will consider objects moving along circular paths at constant speed -- this is referred to as uniform circular motion. From Newton's first law you know that there must be a force acting on this object, otherwise it would move in a straigh ...
... PHYSICS 151 – Notes for Online Lecture #14 In this lecture we will consider objects moving along circular paths at constant speed -- this is referred to as uniform circular motion. From Newton's first law you know that there must be a force acting on this object, otherwise it would move in a straigh ...
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.