Speed (metres per second (m/s) and kilometres per hour (km/h))：練習問題

A toy car travels a distance of \(36\) metres in \(4\) seconds. What is the speed of the toy car in metres per second (m/s)?

A remote-controlled car travels 108 metres along a straight track at a constant speed for 12 seconds. What is the speed of the remote-controlled car in metres per second (m/s)?

A high-speed rail travels at a constant speed of \(75\text{ m/s}\). A private car travels a distance of \(300\text{ km}\) in \(1\text{ hour and } 15\text{ minutes}\) at a constant speed.

What is the difference in their speeds in \(\text{km/h}\)?

A high-speed train travels at a constant speed of \(300\text{ km/h}\). How many kilometres will the train travel in \(1.5\text{ hours}\)?

A high-speed train travels at a constant speed of \( 288 \text{ km/h} \). What is its speed in metres per second \( \text{(m/s)} \)?

A sprinter runs \(100\text{ metres}\) in \(10\text{ seconds}\). Calculate the speed of the sprinter in \(m/s\).

A train travels \(450\text{ km}\) at a constant speed of \(15\text{ m/s}\). How many hours does the journey take?

A plane flies \(2400\text{ km}\) at an average speed of \(800\text{ km/h}\). On the return trip, it encounters a headwind and travels at \(600\text{ km/h}\). What is the average speed of the plane for the entire round trip in \(km/h\)?

A cyclist travels at a constant speed and covers a distance of \( 450 \) metres in \( 30 \) seconds.
(a) What is the speed of the cyclist in metres per second (m/s)?
(b) At this speed, how many metres will the cyclist travel in \( 1.5 \) minutes?

A marathon runner maintains a constant speed during a training session. He runs 15 kilometres in 1 hour and 15 minutes.
(a) Calculate the runner's speed in kilometres per hour (km/h).
(b) Express this speed in metres per second (m/s).
(c) How far, in kilometres, will the runner travel in 2 hours and 30 minutes at the same speed?