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Linear motion
Task 8.1 Procedure
1. Attach a paper tape onto the toy
Measure the distance a round your car.
class using a measuring tape. Using a 2. Pass the paper tape through the
stopwatch, record the time when your ticker-timer (see Figure 8.5).
classmate starts to move from point A, Ticker-timer
round the class and back to the same Tape Toy car
point A. Calculate his or her speed.
Acceleration
Figure 8.5
Task 8.2 3. Set the toy car in motion using a
remote-control device.
Imagine you are in a car. The driver
presses the gas pedal and the car speeds 4. Record the starting time using the
stopwatch.
up. This is acceleration. Now, the 5. Press the remote-control device to
driver presses the brake pedal and the stop the toy car after one minute.
car slows down. This is deceleration.
Discuss how you feel when the car is 6. Record the fi nal stopping time.
accelerating or decelerating. Questions
(a) What did you observe when the
car was set in motion?
Acceleration is a measure of how quickly
an object’s velocity changes. In simple (b) Measure the interval between
terms, it tells us how fast an object is the marked dots on the paper
speeding up or slowing down. If an object tape.
is moving with a constant speed, it is not (c) Calculate the velocity of the toy
accelerating as described in Activity 8.1. car.
But, when its speed or direction changes, (d) Explain your results.
it is accelerates as described in Activity
8.2. Once the toy car is in motion, dots are
made on the paper tape. When calculated,
it is found that the time taken between
Acti vity 8.1 any two consecutive dots is the same.
Aim: To determine the v elocity The toy car moves with uniform velocity
of a toy car using a ticker- when the dots are equally spaced (see
timer. Figure 8.6).
Materials: Toy car, ticker-timer,
paper tape, remote-control
device and stopwatch
Figure 8.6: Dots showing uniform velocity
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Physics Form 1 Final.indd 171 16/10/2024 20:58
