問 1
1 点A student uses a spring balance to pull a wooden block across four different surfaces: ice, sandpaper, a wooden table, and a glass sheet. On which surface will the spring balance show the highest reading in Newtons (N)?
Key Stage 2 (KS2) · Science
Forces：練習問題
その場で採点される選択問題 3 問と、解説つきの記述問題 5 問。すべて「Forces」からの出題です。
8 問18 点無料・登録不要
問 2
1 点An object is moving at a constant speed across a flat surface. If the frictional force acting on the object is exactly 10 N, how much pushing force is being applied to keep it moving at that constant speed?
問 3
1 点A student uses a force meter (Newton meter) to pull a toy car across a floor. If the student adds heavy weights into the car, what will happen to the reading on the force meter when the car starts to move?
問 4
2 点Identify the force that acts against an object moving through water, slowing it down.
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 5
4 点A ball is thrown upwards into the air. Name the two main forces acting on the ball while it is moving through the air and state their directions.
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 6
2 点Which force is responsible for pulling objects towards the center of the Earth and keeps the moon in orbit?
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Forces
A student uses a spring balance to measure the weight of an object in air and then explores the forces acting on a boat in a lake.
(a) What is the standard unit of force?
(b) When a boat is floating stationary on water, there are two main vertical forces acting on it. Name these two forces.
(c) If the boat starts to move forward, what force acts between the boat and the water to oppose its 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 8
4 点Forces and Friction
A student is investigating the forces acting on a block of wood as it is pulled across a horizontal table using a spring balance.
(a) What is the name of the force that acts between the surface of the wooden block and the table to oppose its sliding motion?
(b) If the student pulls the block with a force of \(5\) N but the block does not move, what is the magnitude of the opposing force?
(c) The student then covers the table with a layer of oil. How would this affect the force needed to start the block moving? Explain your answer.
(d) Give one example of a situation where increasing this type of force is beneficial in everyday life.
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