science 5

1. Force & Motion

2. Motion – is a change in
position or location.

3. Distance and Time
• Distance traveled by an object is
the total length of the path it has
completed in one motion.
Smaller Unit Larger Unit
10 mm 1 cm
1000mm 1 m
100 cm 1 m
1000 m 1 km

4. • Time is the measure of duration
that an object takes to travel a
certain distance.
Smaller Unit Larger Unit
60 s 1 min
60 min 1 hour
24 hours 1 day
7 days 1 week
12 months 1 year
365 and ½ days 1 year

5. Speed, Distance & Time

6. The 3 formulas for Speed, Time & Distance:
Speed =
Distance
Time
Time =
Distance
Speed
Distance = Speed x Time
Remember them from
this triangle:
D
S T
Solving for Speed Solving for Time Solving for Distance

7. D
S T
A windsurfer travelled 28 km in 1 hour 45 mins.
Calculate his speed.
Speed =
Distance
Time
28
1•75
=
= 16 km/h
1 hour 45 mins
Answer: His speed was 16 km / hour

8. 2 hour 30 mins
Answer: He travelled 125 km
A salesman travelled at an average speed of 50 km/h for
2 hours 30 mins. How far did he travel?
D
S T
Distance = Speed x Time
= 50 x 2•5
= 125 km

9. Answer: It took 9 hours 15 minutes
A train travelled 555 miles at an average speed of 60
mph. How long did the journey take?
D
S T
Time =
Distance
Speed
555
60
=
= 9•25 hours = 9 hours 15 mins