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Balanced and Unbalanced Forces — Free MYP1 Sciences Practice Questions
1QuestionDefinition and Effects of Balanced ForcesConcept Practice
2 marks~3 minCriterion A
The diagram shows a book resting on a table. Arrow A points downward from the book. Arrow B points upward from the table.
a
Identify which arrow shows the force the table pushes up on the book. [1]
b
Describe what this upward force does to the book. [1]
Solutions
2QuestionDefinition and Effects of Unbalanced ForcesAssessment Practice
4 marks~6 minCriterion D
In a tug-of-war, one team pulls the rope with a force of to the left. The other team pulls with a force of to the right.
a
Identify which direction the rope moves, and state the size of the net force. [1]
b
Describe why the rope moves in that direction. Use the words "balanced" or "unbalanced" in your answer. [1]
c
In real life, one team member slips on the grass. Describe how this changes the forces on the rope compared to when both teams had a firm grip. [2]
Solutions
3QuestionDefinition and Effects of Balanced ForcesConcept Practice
4 marks~6 minCriterion C
The diagram shows a book sitting still on a table. Two forces act on the book: gravity pulls it down and the table pushes it up.
a
Name the downward force acting on the book. [1]
b
Describe what the two forces are doing that keeps the book still. [2]
c
A friend says: "If I push down on the book, it will still stay still because forces always balance." Do you agree? Explain why or why not. [1]
Solutions
4QuestionDefinition and Effects of Balanced ForcesConcept Practice
3 marks~5 minCriterion B
A class plays tug-of-war. The table below shows the number of students on each side of the rope and whether the rope moved.
| Left side (number of students) | 4 | 5 | 4 | 3 |
|---|---|---|---|---|
| Right side (number of students) | 4 | 4 | 3 | 5 |
| Rope moved? | No | Yes | Yes | Yes |
a
Identify the round in which the rope did not move. [1]
b
Describe what the data shows about when the rope moves. [1]
c
Compare what happens to the rope when the forces are balanced and when they are unbalanced. [1]
Solutions
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