問 1
1 点If a toy car is stationary on a track, what is its speed?
Junior Secondary · Science
Motion：練習問題
その場で採点される選択問題 5 問と、解説つきの記述問題 5 問。すべて「Motion」からの出題です。
10 問24 点無料・登録不要
問 2
1 点An athlete is training on a straight road. If she maintains a constant speed of \( 5 \text{ m s}^{-1} \), how much time (in seconds) will it take for her to cover a distance of \( 400 \text{ metres} \)?
問 3
1 点A bird flies \( 6 \text{ km} \) at a speed of \( 20 \text{ m s}^{-1} \). It then rests on a branch for \( 5 \text{ minutes} \) before flying another \( 6 \text{ km} \) in \( 15 \text{ minutes} \). What is the bird's average speed for the entire journey (including the rest time)?
問 4
1 点On a distance-time graph, what does a horizontal straight line parallel to the time axis represent?
問 5
1 点The motion of a robot is represented on a distance-time graph. The line starts at the origin \( (0, 0) \) and goes to the point \( (12, 60) \), where time is in \( \text{s} \) and distance is in \( \text{m} \). The graph then remains horizontal until \( t = 15 \text{ s} \). What is the average speed of the robot for the entire \( 15 \text{-second} \) journey?
問 6
2 点An object is moving such that it covers \( 10 \text{ metres} \) in the first second and \( 15 \text{ metres} \) in the next second. State whether this represents uniform or non-uniform motion and explain your reasoning.
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 7
3 点A remote-controlled toy car travels a distance of \( 180 \text{ m} \) in exactly \( 2 \text{ minutes} \). Calculate the average speed of the car in \( \text{m s}^{-1} \).
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 8
5 点A swimmer pushes off a swimming pool wall to start a lap. Identify the action and reaction forces involved, stating which object exerts which force and how this results in the swimmer's forward motion.
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 9
4 点A cyclist travels a distance of \( 500 \text{ m} \) in a time of \( 25 \text{ s} \).
(a)<\/b> Calculate the average speed<\/b> of the cyclist in \( \text{m s}^{-1} \). (1 point)
(b)<\/b> If the cyclist continues at this same speed, how many seconds<\/b> will it take to travel a total distance of \( 2 \text{ km} \)? (2 points)
(c)<\/b> State the standard SI unit<\/b> of distance. (1 point)<\/p>
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 10
5 点A car trip is planned in two parts: a city drive and a highway drive.
Part 1 (City): The car covers a distance of \(6 \text{ km}\) in \(10 \text{ minutes}\).
Part 2 (Highway): The car travels at a constant speed of \(25 \text{ m/s}\) for \(5 \text{ minutes}\).
a) Calculate the average speed of the car during Part 1 in \(\text{m/s}\).
b) Calculate the distance covered in Part 2 in \(\text{km}\).
c) Determine the overall average speed for the entire trip, expressed in \(\text{m/s}\).
まず自分で答えを書いてから、解説と照らし合わせましょう。
※ thinkaのコンテンツはAIにより生成されているため、内容が正確でない場合があります。補助教材としてご使用いただき、公式の教材と合わせてご確認ください。
模範解答は見ました。次はあなたの答案を採点します。
このページは良い答案の形を示せますが、あなたの答案に何が足りないかは教えられません。thinka は実際の採点基準に沿って記述答案を約 15 秒で採点します。
同じような問題をもっと解きたい？このトピックの新しい問題を、解きながら採点。
練習を始める