Calculating Speed
A cyclist travels 300 metres in 20 seconds.
What is their speed in m/s?
Speed = Distance ÷ Time
v= d/t
= 300 ÷ 20
= 15 m/s
A runner travels at 5 m/s for 12 seconds.
How far do they travel?
d=v x t
= 5 × 12
= 60 metres
A runner travels 100 metres at a speed of 5 m/s.
How long does the journey take?
Answer:
t=d/v
= 100 ÷ 5
= 20 seconds
A car travels 90 km in 1.5 hours.
What is its average speed in km/h?
v=d/t
= 90 ÷ 1.5
= 60 km/h
A car travels at 70 km/h for 2 hours.
How far does it travel?
d=v x t
= 70 × 2
= 140 km
A car travels 120 km at a speed of 60 km/h.
How long does the journey take?
Answer:
t=d/v
= 120 ÷ 60
= 2 hours
A runner completes 800 metres in 4 minutes.
What is their average speed in m/s.
Answer:
Convert 4 minutes to seconds:
4 × 60 = 240 seconds
v=d/t
= 800 ÷ 240
= 3.33 m/s
A cyclist rides at 8 m/s for 5 minutes.
How far do they travel in metres?
Answer:
Convert 5 minutes to seconds:
5 × 60 = 300 seconds
d=v x t
= 8 × 300
= 2400 metres
A cyclist travels 900 metres at a speed of 6 m/s.
How long does the journey take?
Answer:
t=d/v
= 900 ÷ 6
= 150 seconds
Convert to minutes:
150 ÷ 60 = 2 minutes 30 seconds
A train travels 150 km in 2 hours 30 minutes.
What is its average speed in km/h?
2 hours 30 minutes = 2.5 hours
v=d/t
= 150 ÷ 2.5
= 60 km/h
A train travels at 90 km/h for 1 hour 30 minutes.
How far does it travel?
Answer:
1 hour 30 minutes = 1.5 hours
d=v x t
= 90 × 1.5
= 135 km
A train travels 180 km at a speed of 90 km/h.
How long does the journey take?
Answer:
t=d/v
= 180 ÷ 90
= 2 hours
A plane flies 540 miles in 1 hour 30 minutes.
What is its average speed in mph?
Answer:
1 hour 30 minutes = 1.5 hours
v=d/t
= 540 ÷ 1.5
= 360 mph
A plane flies at 200 m/s for 25 minutes.
How far does it travel in metres?
Answer:
Convert 25 minutes to seconds:
25 × 60 = 1500 seconds
d=v x t
= 200 × 1500
= 300,000 metres
A plane travels 360 miles at a speed of 180 mph.
How long does the journey take?
Answer:
t=d/v
= 360 ÷ 180
= 2 hours
Convert to minutes:
2 × 60 = 120 minutes