Page 139 - SK Year 6 Science DLP

KELAJUAN
SPEED
SPEED

4. At 8.30 a.m., Dina’s father left the house and reached his office at 9.00 a.m.
If Dina’s father was driving at a speed of 60 km/h, what is the distance
between his house and the office?
5. If Amir’s toy car travels at a speed of 3 m/s, how far can the car travel in
5 seconds?

6. Rani’s school bus takes half an hour to reach the school that is situated
20 kilometres away from her house.
a) Use the formula to calculate the speed of the school bus.
b) If the speed of the school bus is increased 40 km/h more than the
speed in (a), what is the time needed for the bus to reach the school?

7. In an investigation, toy car P was released down a 3-metre inclined plane.
The investigation was repeated using toy cars Q and R of different masses.
The time needed for the three toy cars to reach the end of the inclined plane
is recorded.

Time
taken (s)
10
6

3

Toy car
P Q R

a) Based on the results in the bar chart above, state two constant variables.
b) What is your observation from this investigation?
c) State one inference to explain your answer in (b).
d) In this investigation, state the
i. manipulated variable
ii. responding variable
e) Which toy car is the slowest? What is its speed?
f) Predict the time taken by toy car P if the height of the inclined plane
is increased.

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