Recitation 1
... Plugging our A and ω into our x(t) yields the equation of motion we set out to find. (b) To find the maximum speed, we could either take the derivative of x(t) (like we did in 12.2), or realize that the derivative will have another factor of ω in it’s amplitude and jump to the answer vmax = Aω = 6π ...
... Plugging our A and ω into our x(t) yields the equation of motion we set out to find. (b) To find the maximum speed, we could either take the derivative of x(t) (like we did in 12.2), or realize that the derivative will have another factor of ω in it’s amplitude and jump to the answer vmax = Aω = 6π ...
RG 6 - mine
... 24. What is the equation for pressure when the force is perpendicular to the surface area? 25. Circle the letter that describes the unit of pressure known as a pascal. a. newtons × area b. newtons per square meter c. newtons per meter d. square meters per second 26. Look at the two books resting on ...
... 24. What is the equation for pressure when the force is perpendicular to the surface area? 25. Circle the letter that describes the unit of pressure known as a pascal. a. newtons × area b. newtons per square meter c. newtons per meter d. square meters per second 26. Look at the two books resting on ...
Topic 4
... 2. While the cart is moving along an aisle, it comes in contact with a smear of margarine that had recently been dropped on the floor. Suddenly the friction force is reduced from -40.0 newtons to -20.0 newtons. What is the net force on the cart if the “pushing force” remains at 40.0 newtons? Does th ...
... 2. While the cart is moving along an aisle, it comes in contact with a smear of margarine that had recently been dropped on the floor. Suddenly the friction force is reduced from -40.0 newtons to -20.0 newtons. What is the net force on the cart if the “pushing force” remains at 40.0 newtons? Does th ...
balance and unbalanced forces for mar 5
... • Inertia: Resistance to the push / pull (force) • Newton’s 1st Law of Motion: – once in motion an object stays in motion - unless acted upon by another unbalanced force. – An object at rest stays at rest – unless acted upon by another unbalanced force. – (7 Inertia Demos) ...
... • Inertia: Resistance to the push / pull (force) • Newton’s 1st Law of Motion: – once in motion an object stays in motion - unless acted upon by another unbalanced force. – An object at rest stays at rest – unless acted upon by another unbalanced force. – (7 Inertia Demos) ...
Centripetal Force and Acceleration
... showing and labeling all the forces acting on the object(s) Choose a coordinate system that has one axis perpendicular to the circular path and the other axis tangent to the circular path ...
... showing and labeling all the forces acting on the object(s) Choose a coordinate system that has one axis perpendicular to the circular path and the other axis tangent to the circular path ...
Centripetal Acceleration
... Acceleration toward the center of a curved or circular path is called centripetal acceleration (ac) The word centripetal means “toward the center.” If an object is spinning in a circle at a constant speed, the object is accelerating. This is because there is a continuous change in direction (and vel ...
... Acceleration toward the center of a curved or circular path is called centripetal acceleration (ac) The word centripetal means “toward the center.” If an object is spinning in a circle at a constant speed, the object is accelerating. This is because there is a continuous change in direction (and vel ...
Section 4.3 - CPO Science
... down, the speed decreases so the car covers less distance each second. The position vs. time graph gets shallower with time. ...
... down, the speed decreases so the car covers less distance each second. The position vs. time graph gets shallower with time. ...
CENTRIPETAL ACCELERATION ACTIVITY
... 8. On the left side of the screen, increase the mass. a. What effect does increasing the mass have on acceleration? b. What effect does increasing the mass have on the net force? 9. On the left side of the screen, now reduce the mass. a. What effect does decreasing the mass have on acceleration? b. ...
... 8. On the left side of the screen, increase the mass. a. What effect does increasing the mass have on acceleration? b. What effect does increasing the mass have on the net force? 9. On the left side of the screen, now reduce the mass. a. What effect does decreasing the mass have on acceleration? b. ...
Honors Physics - Practice Final Exam
... displacement with respect to its original position? A. 3.5 m at 67 north of east C. 6.5 m at 67 north of east B. 8.5 m at 23 north of east D. 6.5 m at 23 north of east 28. An athlete runs a displacement of 110 m, 210.0 across a level field. What is the y-component of this displacement (i.e. the ...
... displacement with respect to its original position? A. 3.5 m at 67 north of east C. 6.5 m at 67 north of east B. 8.5 m at 23 north of east D. 6.5 m at 23 north of east 28. An athlete runs a displacement of 110 m, 210.0 across a level field. What is the y-component of this displacement (i.e. the ...
Proper acceleration
In relativity theory, proper acceleration is the physical acceleration (i.e., measurable acceleration as by an accelerometer) experienced by an object. It is thus acceleration relative to a free-fall, or inertial, observer who is momentarily at rest relative to the object being measured. Gravitation therefore does not cause proper acceleration, since gravity acts upon the inertial observer that any proper acceleration must depart from (accelerate from). A corollary is that all inertial observers always have a proper acceleration of zero.Proper acceleration contrasts with coordinate acceleration, which is dependent on choice of coordinate systems and thus upon choice of observers.In the standard inertial coordinates of special relativity, for unidirectional motion, proper acceleration is the rate of change of proper velocity with respect to coordinate time.In an inertial frame in which the object is momentarily at rest, the proper acceleration 3-vector, combined with a zero time-component, yields the object's four-acceleration, which makes proper-acceleration's magnitude Lorentz-invariant. Thus the concept is useful: (i) with accelerated coordinate systems, (ii) at relativistic speeds, and (iii) in curved spacetime.In an accelerating rocket after launch, or even in a rocket standing at the gantry, the proper acceleration is the acceleration felt by the occupants, and which is described as g-force (which is not a force but rather an acceleration; see that article for more discussion of proper acceleration) delivered by the vehicle only. The ""acceleration of gravity"" (""force of gravity"") never contributes to proper acceleration in any circumstances, and thus the proper acceleration felt by observers standing on the ground is due to the mechanical force from the ground, not due to the ""force"" or ""acceleration"" of gravity. If the ground is removed and the observer allowed to free-fall, the observer will experience coordinate acceleration, but no proper acceleration, and thus no g-force. Generally, objects in such a fall or generally any such ballistic path (also called inertial motion), including objects in orbit, experience no proper acceleration (neglecting small tidal accelerations for inertial paths in gravitational fields). This state is also known as ""zero gravity,"" (""zero-g"") or ""free-fall,"" and it always produces a sensation of weightlessness.Proper acceleration reduces to coordinate acceleration in an inertial coordinate system in flat spacetime (i.e. in the absence of gravity), provided the magnitude of the object's proper-velocity (momentum per unit mass) is much less than the speed of light c. Only in such situations is coordinate acceleration entirely felt as a ""g-force"" (i.e., a proper acceleration, also defined as one that produces measurable weight).In situations in which gravitation is absent but the chosen coordinate system is not inertial, but is accelerated with the observer (such as the accelerated reference frame of an accelerating rocket, or a frame fixed upon objects in a centrifuge), then g-forces and corresponding proper accelerations felt by observers in these coordinate systems are caused by the mechanical forces which resist their weight in such systems. This weight, in turn, is produced by fictitious forces or ""inertial forces"" which appear in all such accelerated coordinate systems, in a manner somewhat like the weight produced by the ""force of gravity"" in systems where objects are fixed in space with regard to the gravitating body (as on the surface of the Earth).The total (mechanical) force which is calculated to induce the proper acceleration on a mass at rest in a coordinate system that has a proper acceleration, via Newton's law F = m a, is called the proper force. As seen above, the proper force is equal to the opposing reaction force that is measured as an object's ""operational weight"" (i.e., its weight as measured by a device like a spring scale, in vacuum, in the object's coordinate system). Thus, the proper force on an object is always equal and opposite to its measured weight.