1 study the motion of an object with ticker timer 2 calculate speed velocity acceleration and...
TRANSCRIPT
Is a device used to study the motion of an object for a short period of time
Vibrating steel strip will vibrate 50 times every second and make 50 dots a second on a tape being pulled through
Time interval between 2 consecutive dots ( 1 tick) is 1/50s or 0.02s
To calculate time: No. of tick x 0.02s
. . . .
1 dot1 tick
TEST YOURSELFWhat are the time taken for:
. . . . . .
. . .
. . . . .
Besides time taken ticker timer is also used to determine:
a)Velocityb)Accelerationc)Types of motiond)Distance
HOW TO MEASURE VELOCITY? ACCELERATION?
DETERMINE VELOCITY
How may ticks that you can see?Can you calculate the time taken?What are the distance?Thus:
VELOCITY = DISTANCE UNIT?? TIME TAKEN
. . . . . . . . .
12cm
A B
DETERMINE ACCELERATION
Determine time of 1 partFind initial velocityFind final velocityTotal time = (Total parts - 1) x time of one partACCELERATION = v-u
t
. . . . . . . . . . .
A B C D E F
2cm8 cm
IMPORTANT!!!*To find acceleration: Total time = (Total parts - 1) x time of one part
*To find velocity:Use a normal method without -1 !
TRY THIS!!
Find :a)Accelerationb)Average speed
. . . .
5 cm7 cm6 cm
TYPE OF MOTION
Distance between dot is sameObject moving with constant speed
. . . . . . .Direction of motion
Distance between dot is increasingObject moving faster / accelerate
. . . . . . . . . .Direction of motion
. . . . . . . . . . . . .Direction of motion
The object is _____________________
The object is moving very _______________
…………………………………………….Direction of motion
Ticker timer can be used to determine:
(State 4!)
In the study of linear motion of a trolley on a runway; the time taken for the movement of the trolley is recorded by a ticker timer
TRUE OR FALSE?
Vibrating steel strip will vibrate _________ times in a second
Draw the diagram of ticker tape that shows the object is moving with decreasing velocity