Chapter 4 Homework
... horizontal. (a) What is the normal force that the incline exerts on the block? (b) What is the magnitude of acceleration of the block? ...
... horizontal. (a) What is the normal force that the incline exerts on the block? (b) What is the magnitude of acceleration of the block? ...
Motion Along a Straight Line at Constant
... If the velocity is constantly changing then by definition the object is accelerating If the object is accelerating, then an unbalanced force must exist ...
... If the velocity is constantly changing then by definition the object is accelerating If the object is accelerating, then an unbalanced force must exist ...
Electric Fields and Potential
... Forces act without _____________ between objects ____________________ field pull mass towards earth _____________________ field surrounds electrically charged objects Explains ____________________________ Electric Field Proposed by _______________________ (1830’s) Has both _______________ (strength) ...
... Forces act without _____________ between objects ____________________ field pull mass towards earth _____________________ field surrounds electrically charged objects Explains ____________________________ Electric Field Proposed by _______________________ (1830’s) Has both _______________ (strength) ...
Reading Questions for Holt Physics Chapter 4
... 2. For a force to be exerted two objects must be in contact with one another. 3. When you draw an arrow representing a force in an FBD, it is important to label the arrow with either the magnitude of the force or a name that will distinguish it from the forces acting on the object. Also be sure that ...
... 2. For a force to be exerted two objects must be in contact with one another. 3. When you draw an arrow representing a force in an FBD, it is important to label the arrow with either the magnitude of the force or a name that will distinguish it from the forces acting on the object. Also be sure that ...
Force
... -friction acts in a direction opposite to the direction of the motion -2 Factors that affect the force of friction - how hard the surfaces push together -types of surfaces involved -4 Types of Friction -Static Friction -Sliding Friction -Rolling Friction -Fluid Friction Gravity -Law of Universal Gra ...
... -friction acts in a direction opposite to the direction of the motion -2 Factors that affect the force of friction - how hard the surfaces push together -types of surfaces involved -4 Types of Friction -Static Friction -Sliding Friction -Rolling Friction -Fluid Friction Gravity -Law of Universal Gra ...
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.