Kinematics 2. and 3. dimension

Question 1

Acceleration vector

Answer 1

instantaneous acceleration found by taking the derivative of the velocity function with respect to time in unit vector notation.

Question 2

angular frequency

Answer 2

w, rate of change of and angle with which an object that is moving on a circular path

Question 3

centripetal acceleration

Answer 3

component of acceleration of an object moving in a circle that is directed radially inward toward the center of the circle

Question 4

displacement vector

Answer 4

vector from the initial position to a final position on a trajectory of a particle

Question 5

Position vector

Answer 5

vector from the origin of a chosen coordinate system to the position of a particle in two- or three-dimensional space

Question 6

projectile motion

Answer 6

motionof an object subject only to the acceleration of gravity

Question 7

range

Answer 7

maximum horizontal distance a projectile travels

Question 8

reference frame

Answer 8

coordinate system in which the position, velocity, and acceleration of an object at rest or moving is measured

Question 9

relative velocity

Answer 9

velocity of an object as observed from a particular reference frame, or the velocity of one reference frame with respect to another

Question 10

tangental acceleration

Answer 10

magnitude of which is the time rate of change of speed. Its direction is tangent to the circle.

Question 11

time of flight

Answer 11

elapsed time a projectile is in the air

Question 12

total acceleration

Answer 12

vector sum of centripetal and tangental acceleration

Question 13

trajectory

Answer 13

path of a projectile through the air

Question 14

velocity vector

Answer 14

vector that gives the instantaneous speed and direction of a particle; tangent to the trajectory