Linear Kinematics

Question 1

rectilinear

Answer 1

all points move in straight line with no change in direction or orientation, and all points move the same distance

Question 2

curvilinear

Answer 2

all points move so that orientation of object does not change and all points move the same distance; but direction changes

Question 3

rectilinear example

Answer 3

• skating: gliding in the sane direction

Question 4

curvilinear example

Answer 4

• ski jumping: body stays in same shape but direction change (curved trajectory)

Question 5

rotational (angular) movements

Answer 5

• circular path around rotational axis
• all points travel over an equally large angle in same direction at the same time
• line between two points changes orientation

Question 6

rotational (angular) movement example

Answer 6

bicep curl: elbow joint stays as hand moves

Question 7

types of motion in linear kinematics

Answer 7

most often a combination of translational and rotational movements

Question 8

position

Answer 8

location in space relative to some baseline value or axis

Question 9

motion

Answer 9

an object which experiences a change in position

Question 10

distance

Answer 10

length of actual motion (scalar)

Question 11

displacement

Answer 11

change in position, measured as a straight line from initial position to final position (vector)

Question 12

example when distance is more important than displacement

Answer 12

• running a race on a circle track

Question 13

example when displacement is more important than distance

Answer 13

in a football game - running yards,

Question 14

speed

Answer 14

distance covered over a period of time (scalar)

Question 15

velocity

Answer 15

change in position over a period of time (vector)

Question 16

instantaneous velocity

Answer 16

how fast something is moving over a given time

Question 17

integration

Answer 17

finding the area under the velocity-time curve

Question 18

acceleration

Answer 18

change in velocity over a period of time (vector)