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ATM82517

P6 Science

Question post on Sun, 16/04/2017 7:37pm

My question is why both boys have the same amount of gravitational force acting on them? thank you.

Answer

SAHMom · Answer 1 · Post on Mon, 17/04/2017 11:25pm

I can’t find reference in primary science guide that P6 needs to learn gravitatiional force. F=mg (m is mass of object and g is gravitational acceleration, constant, for free falling object) . So for falling objects of same mass, downward gravitational force is the same.

The question is likely a trick question to confuse a student between

(1) graviational potential energy (more for the boy A)-in syllabus and

(2) gravitational force (same for both boy).

If concept of g is not required, then this question is invalid to test a P6 student. Can consider double check with school science teacher. good if you can let us know here any outcome or reference point. Thanks.

SAHMom · Answer 2 · Post on Mon, 17/04/2017 11:25pm

I can’t find reference in primary science guide that P6 needs to learn gravitatiional force. F=mg (m is mass of object and g is gravitational acceleration, constant, for free falling object) . So for falling objects of same mass, downward gravitational force is the same.

The question is likely a trick question to confuse a student between

(1) graviational potential energy (more for the boy A)-in syllabus and

(2) gravitational force (same for both boy).

If concept of g is not required, then this question is invalid to test a P6 student. Can consider double check with school science teacher. good if you can let us know here any outcome or reference point. Thanks.

Ender · Answer 3 · Post on Fri, 26/05/2017 7:12pm

Agree, when you talk about force you talk about mass and acceleration (formula wise, they ar both factors of force). Since both boys are similar built, i.e. mass is the same for both, and the acceleration is also fixed at 9.81 m/sec2 . So the gravitational FORCE (.e. the weight of the boys) is the same…

one big round is actually talking about the weight(not mass) of the boys in NEWTON…

SAHMom · Answer 4 · Post on Sat, 27/05/2017 8:12am

SAHMom Post on Sat, 27/05/2017 8:12am

Hi Ender, thanks. Nice to “see” you again! 🙂

Ender · Answer 5 · Post on Sat, 27/05/2017 4:10pm

Thanks. Come here once a while to “see look” abit. 😁. Will be active again next year when my daugther goes to p3.

ATM82517 · Answer 6 · Post on Tue, 18/04/2017 12:21pm

ATM82517 Post on Tue, 18/04/2017 12:21pm

Hi SAHmom, thanks. will post the request for teacher.

kiangkiang · Answer 7 · Post on Mon, 15/05/2017 6:16pm

Gravitational force or gravity exerted by the Earth is constant for all objects on Earth. Needn’t overlearn the Big G or small G