alevel mechanics

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sash_needs_help
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#1
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#1
A block of weight 18 N rests in equilibrium on a rough horizontal plane under the action of a force of 9 N. Find the magnitude of the frictional force on the block given that the external force acts
(i) horizontally
(ii) vertically downwards
(iii)downwards at an angle of 60° to the horizontal.

please help
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mqb2766
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#2
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#2
(Original post by sash_needs_help)
A block of weight 18 N rests in equilibrium on a rough horizontal plane under the action of a force of 9 N. Find the magnitude of the frictional force on the block given that the external force acts
(i) horizontally
(ii) vertically downwards
(iii)downwards at an angle of 60° to the horizontal.

please help
What are you stuck with?
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username5416228
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#3
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#3
(Original post by sash_needs_help)
A block of weight 18 N rests in equilibrium on a rough horizontal plane under the action of a force of 9 N. Find the magnitude of the frictional force on the block given that the external force acts
(i) horizontally
(ii) vertically downwards
(iii)downwards at an angle of 60° to the horizontal.

please help
Is there a diagram given? If so, could you attach it
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username4653922
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#4
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#4
(Original post by sash_needs_help)
A block of weight 18 N rests in equilibrium on a rough horizontal plane under the action of a force of 9 N. Find the magnitude of the frictional force on the block given that the external force acts
(i) horizontally
(ii) vertically downwards
(iii)downwards at an angle of 60° to the horizontal.

please help
I think it would also help if you had the number of marks each part of the question is worth
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sash_needs_help
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#5
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#5
(Original post by hannanj0)
Is there a diagram given? If so, could you attach it
there is no diagram. i think if i had one, the question would be a lot easier and i could solve the problem.
i don't understand where the 9N should go on the diagram
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mqb2766
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#6
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#6
(Original post by sash_needs_help)
there is no diagram. i think if i had one, the question would be a lot easier and i could solve the problem.
i don't understand where the 9N should go on the diagram
It's different in each of the parts. Draw a diagram and write the forces for i) with it (9N force) horizontal.
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username4653922
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#7
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#7
I drew this for you so hopefully it helps! Someone please correct me if I've drawn anything wrong
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Last edited by username4653922; 1 year ago
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sash_needs_help
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#8
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#8
(Original post by DeninMathew)
I drew this for you so hopefully it helps! Someone please correct me if I've drawn anything wrong

EDIT: I forgot the Frictional force in part 2 and 3 so please add them to ur diagram
thank you so much!
this helps a lot
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