# Shared Flashcard Set

## Details

Velocity and Acceleration
Velocity and Acceleration deff. & ideas
40
Physics
01/07/2007

Term
 Displacement
Definition
 A change of position in a particular direction.
Term
 Motion
Definition
 The displacement of an object in relation to objects considered to be stationary.
Term
 Speed
Definition
 The time rate of motion (aka the change in distance over the change in time)
Term
 Constant Speed
Definition
 Speed over all randomly chosen intervals has the same value.
Term
 Velocity
Definition
 Speed in a particular direction.
Term
 Uniform Motion
Definition
 Characterized by a constant voelocity.
Term
 Variable Motion
Definition
 Characterized by a changing velocity.
Term
 Instantaneous Velocity
Definition
 Represented by the slope of the tangent to a curve of a graph.
Term
 Velocity Vector
Definition
 Represents the magnitude and direction of a velocity.
Term
 Resultant Velocity
Definition
 Diagonal of a velocity parallelogram
Term
 A displacement is a vector quantity. This statment means that displacement has ..a.., ..b.., and point of ..c..
Definition
 a)speed b)direction c)reference
Term
 If we compare the displacement of one object with respect to another, we can detect ____ motion.
Definition
 Net
Term
 The slope of a line of a graph is the ration of the ..a.. component of the line to the corresponding ..b.. component.
Definition
 a)y b)x
Term
 If distance in meters is plotted on the vertical axid of a graph and time in seconds is plotted on the horizontal axis, the slope of a line on the graph represents ..a.. in the units..b..
Definition
 a)speed b)m/s
Term
 If a graph representing speed is a straight line, the speed is ....
Definition
 constant
Term
 Average speed is calculated by ..a.. the total..b.. by the ..c..
Definition
 a)dividing b)distance c)elapsed time
Term
 MathWhat is the average speed in km/h of an automobile that travels at 485km. in 6h. 30min?
Definition
 74.6km/hr
Term
 MathA straight river with parallel banks flows at 4km/h. A boat moves directly downstream rlative to the water at 11km/h. What is the velocity of the boat relative to the river bank?
Definition
 15km/h downstream
Term
 MathA straight river with parallel banks flows at 4km/h. If a boat moves directly upstream relative to the water at 9km/h, what is it's velocity relative to the river bank?
Definition
 5km/h Upstream
Term
 MathAn object moves along a straight path 2.5m durring1.0s, 5.0m durring 2.0s and 7.5m durring 3.0s. What is its relocity?
Definition
 2.5m/s
Term
 The distance from Denver to El Paso is 1142km. If the traveling time is 15.08h, what is the average speed?
Definition
 75.7km/h
Term
 Because speed is completley described in terms of magnitude alone, it is a(n) ____ quantity.
Definition
 Scalor
Term
 When a motion is at a particular speed in a particular direction, the term ____ is used. (speed / velocity)
Definition
 Velocity
Term
 If ?d represents displacement durring the time interval ?t, the equationfor average velocity is...
Definition
 V(av)= ?d/?t when d= displacement and t=time
Term
 The ration d/t at a particular instant is the ____.
Definition
 Instantaneous velocity
Term
 If the ration d/t is said to be constant, the motion is said to be ____.
Definition
 uniform
Term
 Since velocities require magnitude and direction for their description and they combine appropriately, velocities are _____ quantities.
Definition
 vector
Term
 The rate of change of velocity is called _____.
Definition
 acceleration
Term
 When the velocity ofa body increases or decreases the same amount in successive units o time, the acceleration is ____.
Definition
 constant
Term
 Constant motion is described as _____ accelerated motion.
Definition
 uniformly
Term
 An object that moves linearly 2.0m durrig the 1st seccond, 6.0m during the 2nd second, and 10.0m durring the 3rd seccond has and acceleration of ____.
Definition
 2.67m/s^2
Term
 In terms of ?d and ?t, acceleration is expressed as ____.
Definition
 (?d)/(?t^2)
Term
 The acceleration due to gravity (is constant/ varies) over the earth's surface.
Definition
 varies
Term
 What algebrai relationship expresses the displacement of an object in terms of its average velocity and elapsed time of travel?
Definition
 ?d=V(av)*?t
Term
 In cases of uniformly accelerated motion, how may the final velocity be expressed in terms of initial velocity, acceleration, and elapsed time?
Definition
 a=V(f)/t
Term
 Durring any interval of time in which the initial and final velocities are known, how is the average velocity expressed algebreically?
Definition
 V(av)=(Vf-Vi)/t when... V(av) is average velocity Vf is final velocity Vi is initial velocity t is time
Term
 MathAn automoile is accelerated from rest at the rate of 3.00m/s^2. What is the velocity at the end of 5.0s?
Definition
 v=a/t 0.6m/s
Term
 MathAn automobile is accelerated from rest at the rate of 3m/s^2. What distance does the automobile travel in 5.0s?
Definition
 3.8m
Term
 MathAn object is dropped from a tower 80.0m high. Whith what velocityy does it strike the earth>
Definition
 308m/s
Term
 MathA motorbike has an initial velocity of 3.0m/s. If it is acclelrated at the rate of 0.5m/s^2 for 7.0s, what is the final velocity?
Definition
 V(f)=V(i)+at 6.5m/s
Supporting users have an ad free experience!