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This velocity is the asymptotic limiting value of the acceleration process, because the effective forces on the body balance each other more and more closely as the terminal velocity is approached. In this example, a speed of 50 % of terminal velocity is reached after only about 3 seconds, while it takes 8 seconds to reach 90 %, 15 seconds to ...
The COR is a property of a pair of objects in a collision, not a single object. If a given object collides with two different objects, each collision has its own COR. When a single object is described as having a given coefficient of restitution, as if it were an intrinsic property without reference to a second object, some assumptions have been made – for example that the collision is with ...
When vehicles collide, the damage increases with the relative velocity of the vehicles, the damage increasing as the square of the velocity since it is the impact kinetic energy (1/2 mv 2) which is the variable of importance. Much design effort is made to improve the impact resistance of cars so as to minimize user injury.
In mechanics and physics, shock is a sudden acceleration caused, for example, by impact, drop, kick, earthquake, or explosion. Shock is a transient physical excitation. Shock describes matter subject to extreme rates of force with respect to time. Shock is a vector that has units of an acceleration (rate of change of velocity).
The downward force of gravity (F g) equals the restraining force of drag (F d) plus the buoyancy. The net force on the object is zero, and the result is that the velocity of the object remains constant. Terminal velocity is the maximum speed attainable by an object as it falls through a fluid (air is the most common example).
The data for these points lie to the left extreme of the abscissa and are not within the frame of the graph. When R ∗ < 5, the data lie on the line B(R ∗) = R ∗; flow is in the smooth pipe regime. When R ∗ > 100, the data asymptotically approach a horizontal line; they are independent of Re, f D, and ε / D .
Graphs of C L and C D vs. speed are referred to as drag curves. Speed is shown increasing from left to right. Speed is shown increasing from left to right. The lift/drag ratio is given by the slope from the origin to some point on the curve and so the maximum L/D ratio does not occur at the point of least drag coefficient, the leftmost point.
The data to calculate these fire control corrections has a long list of variables including: [70] ballistic coefficient or test derived drag coefficients (Cd)/behavior of the bullets used; height of the sighting components above the rifle bore axis; the zero range at which the sighting components and rifle combination were sighted in; bullet mass