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# M1 Help!? watch

1. I need a little help with this question as I'm not sure how to draw the diagram for it so I was wondering if anyone had any idea of how to go about answering it! Thanks!

A particle of mass 10kg is in contact with a rough horizontal surface. It is acted upon by a force of 30N acting at an angle of 40° to the surface. (In an upward direction)

The particle accelerates along the surface constantly at 2m)s^2
Find:
a) the magnitude of the normal reaction
b) the magnitude of the friction reaction
c) the coefficient of friction
2. (Original post by Peachy23)
I need a little help with this question as I'm not sure how to draw the diagram for it so I was wondering if anyone had any idea of how to go about answering it! Thanks!

A particle of mass 10kg is in contact with a rough horizontal surface. It is acted upon by a force of 30N acting at an angle of 40° to the surface. (In an upward direction)

The particle accelerates along the surface constantly at 2m)s^2
Find:
a) the magnitude of the normal reaction
b) the magnitude of the friction reaction
c) the coefficient of friction
Here's a diagram to get you started:

a) You can resolve vertically for the normal reaction.

b) Then, since you know the acceleration, I'd start with "Resultant force = mass x acceleration" considering the horizontal motion.

This will give you the resultant horizontal force, from which you can work out the frictional force, etc.
3. (Original post by ghostwalker)
Here's a diagram to get you started:

a) You can resolve vertically for the normal reaction.

b) Then, since you know the acceleration, I'd start with "Resultant force = mass x acceleration" considering the horizontal motion.

This will give you the resultant horizontal force, from which you can work out the frictional force, etc.
That's how I had drawn the diagram so I'm happy to know I got it right! Thanks for the advice, I'll try to do the question

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