A Rochor parent considering weekday or weekend Primary 6 PSLE Science tuition may see a child write, “There is no gravitational force on the book because it is not moving.” The book sits quietly on a desk, but Earth’s gravitational pull has not vanished. The table provides an upward supporting force that prevents the book from falling through it. No visible movement does not mean no forces are acting.
This distinction gives parents a very precise tuition goal. A learner should identify the direction of gravitational force on a book resting on a table, then explain what changes when the book is held by a hand or released in the air. The same object can be stationary or moving while gravity acts throughout. A changed illustration after a delay is a stronger test than copying a downwards arrow from the tutor.
For families around Rochor and central Singapore, lesson timing matters when Primary 6 work becomes demanding. A weekday Science tutorial can discuss a fresh exam-script error; a weekend session may permit more patient comparison. eduKateSG teaches in premium three-pax small groups, where each child can explain before the teacher intervenes. The Rochor title is a local parent guide, not a claim of a venue or available tuition slot.
eduKateSG · Primary 6 PSLE Science · Rochor
A stationary book still has weight: gravity acts even when the table prevents the book from falling.
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Follow a two-chapter reading route matching the exact issue in the marked question. The worked Science case, independent force prediction and lesson-day planning table help parents evaluate whether their child can reason beyond the original picture.
Full chapter index · Independent check · Programme information
Full chapter index
Chapters 1–5: diagnose, understand, work through and compare
1. Hear why the learner thinks gravity has stopped
2. Explain weight and support in age-appropriate language
3. Read three positions of the same book
4. Use weekday tuition to correct the original force arrow
5. Use weekend tuition for a more connected forces comparison
Chapters 6–10: repair, retest, evaluate and plan
6. Repair the no-motion-no-force shortcut without its opposite
7. Try a new object supported by a string
8. Choose lesson timing based on the new force explanation
9. Questions parents ask about gravity and stationary objects
10. Bring the wrong force claim and a changed support diagram
CHAPTER 1 OF 10 · Find the stationary-means-no-force claim
1. Hear why the learner thinks gravity has stopped
Ask the pupil to describe what they observe: the book is not changing position. Then ask what they infer: gravity is absent. The mistake happens between those two sentences. Motion is something we can observe, while forces can act even when an object is not moving. The student has mistaken a lack of movement for a lack of forces.
Another common version is that the table somehow switches gravity off. Ask what happens if the table is taken away while nothing else supports the book. The book falls because gravitational pull is still present. The role of the table is supporting the book against that pull, not cancelling the existence of gravity as a force from Earth.
Keep the original marked answer. A tutor may need to repair the concept of force, the direction of weight or the difference between what supports an object and what pulls it downward. Each need can be addressed with a specific changed diagram rather than a generic extra revision session.
CHAPTER 2 OF 10 · Find the stationary-means-no-force claim
2. Explain weight and support in age-appropriate language
Objects have weight because gravity exerts a force on them. Near Earth’s surface, the gravitational force on a book acts downwards toward Earth. If the book is resting on a stable horizontal table, the table also exerts an upward contact force on the book, supporting it so that it remains at rest.
The learner does not need an advanced mathematical treatment of forces to understand this. Say explicitly what each force is and who exerts it: Earth pulls the book downward; the table pushes upward on the book. In an ordinary steady resting situation, those effects prevent downward motion while gravity continues to act.
Do not confuse the table’s support with the book pushing down on the table. These statements describe forces on different objects. A Primary 6 Science explanation should name the book as the object being considered and show the relevant downward gravitational force even when no movement is observed.
CHAPTER 3 OF 10 · Compare the book on table, in hand and released
3. Read three positions of the same book
Imagine three paper pictures of the same book in the same room. In Picture A the book rests on a desk. In B a person holds it steady in one hand. In C the person has released the book and it is falling downward. The diagram asks whether gravitational force acts on the book in each stage and what prevents it from falling in the first two.
Gravity acts on the book in A, B and C. The desk supports it in A, and the hand supports it in B. In C, the supporting contact has been removed, so the book begins or continues to move downward under the effect of gravity. Saying “gravity starts in C” would confuse the disappearance of a supporting force with the appearance of gravity.
These are simplified paper observations and not instructions to drop heavy books at home. A correct response separates the ongoing downward force from the changing support conditions. The presence or absence of an upward support is the part that differs between the pictures.
| Illustrative position | Does gravity act downwards? | What provides support? |
|---|---|---|
| A: book resting on desk | Yes | Desk’s upward contact support |
| B: book held motionless in hand | Yes | Hand’s upward support |
| C: book released and falling | Yes | Support has been removed |
CHAPTER 4 OF 10 · Compare the book on table, in hand and released
4. Use weekday tuition to correct the original force arrow
A weekday PSLE Science lesson may be helpful soon after the marked test returns. The student remembers why they wrote that the stationary book had no forces. The tutor can ask them to identify which object is being discussed and draw one arrow for gravity and one for the table’s support in the original steady picture.
After school, some children can focus well on one precise concept; others find force diagrams difficult when tired. A short correction followed by an independent retest can be more useful than rushing through a thick stack of diagrams. The aim is an explanation the pupil can reproduce, not simply an arrow placed correctly after prompting.
On another day, change the supporting object from a table to a shelf or hand. Ask whether the direction of gravity changes merely because the object is held differently. This changed question tests whether the learner understands the origin of the force rather than memorises a particular desk drawing.
CHAPTER 5 OF 10 · Select a sustainable learning window
5. Use weekend tuition for a more connected forces comparison
A weekend session can allow the tutor to compare the book resting, being held and falling without hurrying through three separate diagrams. Children can practise asking two questions at each stage: what pulls downward, and what, if anything, supports the book against that pull?
The comparison should focus on the distinction between existing forces and changing motion. A stationary object may be subject to forces, and a falling object may also experience other physical influences, but the central Primary 6 idea is that Earth’s gravitational pull acts throughout these ordinary circumstances.
Leave space for rest and a short weekday return. A detailed weekend discussion is most valuable when a child can later explain a different object, such as a hanging bag, without the tutor’s original force arrows visible.
CHAPTER 6 OF 10 · Select a sustainable learning window
6. Repair the no-motion-no-force shortcut without its opposite
“Stationary means there are no forces” is wrong. The opposite statement “every force always makes an object start moving” is wrong too. Forces can be present while an object remains at rest when its circumstances prevent a change in motion. The table supporting a resting book is a clear illustration.
Ask the child to describe both the gravitational force and the support without using the phrase gravity is switched off. Then remove the support in a changed thought experiment. The learner should explain why the book can start to fall, while recognising that gravity was acting even before the support disappeared.
In a three-student tutorial, one pupil might describe the table, another the hand and another the released book. Each should then answer a fresh diagram alone. Hearing a classmate’s explanation is helpful, but every child needs to show their own understanding of what force acts and which support changes.
CHAPTER 7 OF 10 · Try a new support-and-gravity question
7. Try a new object supported by a string
Cover the original book pictures and read the independent check below. It features a small bag hanging motionless from a string. The learner must name the force pulling down and the support preventing it from falling. Then the supporting string is removed in the described second picture.
The correct reasoning is not that gravity suddenly appears when the string is cut. Earth’s gravitational pull acts on the bag in both pictures. The string supplies a supporting pull while intact; without that support, the bag can begin to fall. The learner should identify the changed support rather than merely point to the movement.
Ask for a fresh example after a delay: a fruit on a branch, or a box resting on a shelf. If the child can recognise gravity in the stationary setup and explain what would happen if support disappeared, the principle has begun to transfer.
Independent check
A small bag hangs motionless from a string attached to a hook. A pupil says there is no gravitational force because the bag does not fall. In a second diagram the string no longer supports the bag and it begins falling. Did gravity start acting only in the second diagram? Explain.
Checking notes
No. Earth’s gravitational force acts on the bag in both diagrams. The intact string supplies a supporting upward force in the first situation. With that support removed, the bag can fall. Absence of motion never established that gravity was absent.
CHAPTER 8 OF 10 · Try a new support-and-gravity question
8. Choose lesson timing based on the new force explanation
Weekday tuition can respond quickly to a marked question and preserve the student’s original reason for correction. Weekend tuition may provide room for comparison of several supported and unsupported objects. Both are useful only when the child has enough attention to explain the forces and time to retrieve the concept independently afterward.
Three progress markers help: the pupil recognises gravitational force on a stationary object, names what supports the object, and correctly explains how removing that support changes motion without claiming that gravity only begins then. A new diagram is a better test than asking the same desk question twice.
Rochor families should check actual class location, travel from school, meals, homework and availability. The local headline offers an accessible parent guide but does not establish that an eduKateSG classroom exists at Rochor or that a particular slot is currently open.
| Lesson question | Weekday option | Weekend option |
|---|---|---|
| Fresh marked claim | Repair the no-motion-no-force sentence promptly | Compare desk, hand and falling cases slowly |
| Force identification | Name Earth’s pull and table support | Explore different supported objects |
| Changed independent check | Use hanging bag after a delay | Brief weekday return after weekend teaching |
| Success marker | Finds gravity when stationary | Identifies support without confusing the force source |
CHAPTER 9 OF 10 · Plan PSLE Science revision from evidence
9. Questions parents ask about gravity and stationary objects
Does gravity act on a stationary object? Yes. An object resting on a table still has weight because of gravitational force. The fact that it does not move does not mean the force has disappeared.
Does the table remove gravity? No. The table supports the object, preventing downward movement in the ordinary resting situation. Gravity continues to act downwards on the book.
What is the difference between mass and weight? Mass is a property associated with the amount of matter and inertia of an object; weight is the force due to gravity. For this Primary 6 question, the needed distinction is that weight exists even when the object is supported and not moving.
Does a book on a table still have weight? Yes. Gravity still exerts force on the book.
Does stationary mean there are no forces? No. A stationary object can have forces acting on it.
What changes when the supporting surface is removed? The upward support is removed; gravity continues to act and the book can move downward.
CHAPTER 10 OF 10 · Plan PSLE Science revision from evidence
10. Bring the wrong force claim and a changed support diagram
Bring the original PSLE Science practice question with the sentence about gravity being absent. Ask the tutor to hear the pupil’s explanation before correcting it, then test the idea with an unfamiliar supported object. This identifies whether the missing link is gravitational force, support or interpreting what stationary means.
In eduKateSG’s premium three-pax learning format, each student should have enough time to identify the force exerted by Earth and describe the relevant support. The later independent drawing and explanation show whether the child can transfer the concept from books to bags or other common objects.
Read the eduKateSG Primary 6 Science programme and confirm the learner’s actual Standard or Foundation Science course requirements, tuition location and available days. Choose the timetable that leaves room for understanding and calm, independent review.
Chapter index ↑ · Previous chapter · Programme information →
The MOE 2023 Primary Science syllabus covers gravitational force and the idea that objects have weight because of gravity at Primary 6. The illustrative descriptions here focus on forces and observations without requiring advanced force calculations. Confirm the student’s current Standard or Foundation Science scope and PSLE examination year.
Read the related Primary 3, Primary 4 and Primary 5 Rochor Science guides or the wider weekdays-versus-weekends learning guide. Rochor identifies the intended local readers, not an eduKateSG teaching venue; contact the programme to verify class times, fees and location.