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primary 5 | Maths
| Whole Numbers
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Science. Sorry but I really need help. Thx.
Date Posted: 2 years ago
Views: 248
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Spring is attached to the iron and being stretched →elastic spring force is acting on the iron to prevent it from falling onto the table.
Gravitational force is always there, the iron bar is being pulled towards the centre of the Earth (and so it will be pulled towards the table in the same process)
There is no magnetic force of repulsion since the iron bar is a magnetic material and not a magnet (i.e it does not have poles)
Frictional force is irrelevant here because the iron bar is not moving against any surface.
Answer is (2) , B and C only
Gravitational force is always there, the iron bar is being pulled towards the centre of the Earth (and so it will be pulled towards the table in the same process)
There is no magnetic force of repulsion since the iron bar is a magnetic material and not a magnet (i.e it does not have poles)
Frictional force is irrelevant here because the iron bar is not moving against any surface.
Answer is (2) , B and C only
For further reading :
https://www.sciencefacts.net/spring-force.html
https://www.sciencefacts.net/spring-force.html
Thanks but Yong KC's answer is 4 so I am confused......
See my reply to his answer.
Ok.
Thank you.
Saw it?
D would have been correct if it was 'magnetic force of attraction' instead
The magnet is pulling the iron(a magnetic material) towards it.
D would have been correct if it was 'magnetic force of attraction' instead
The magnet is pulling the iron(a magnetic material) towards it.
Sorry . Answer should be (2). Mr J is correct... I did not read in detail
It's okay. Just read the question carefully next time.
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