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Mechanics 1 question a bit stuck!
Ok, so i got the first two parts completely correct, but i dont get how to prove the third part.
A particle of mass M kg slides down a rough plane which is inclined at 30 degree to the horizontal. The particle passes through a point A with speed 4ms, and two seconds later it passes through a point B with speed 9ms.
i) Find the acceleration of the particle
Using suvat, correct answer of 2.5ms-2 !
ii) find the distance AB
following up suvat
s=13m
iii) Show that the frictional force on the particle is 2.4M newtons??
I have resolved it and have used f = ma with not much success, then f=uR but i assume you dont need that yet as the last part asks you to find the co-efficient of friction. Im sure its easy, help appreciated!
A particle of mass M kg slides down a rough plane which is inclined at 30 degree to the horizontal. The particle passes through a point A with speed 4ms, and two seconds later it passes through a point B with speed 9ms.
i) Find the acceleration of the particle
Using suvat, correct answer of 2.5ms-2 !
ii) find the distance AB
following up suvat
s=13m
iii) Show that the frictional force on the particle is 2.4M newtons??
I have resolved it and have used f = ma with not much success, then f=uR but i assume you dont need that yet as the last part asks you to find the co-efficient of friction. Im sure its easy, help appreciated!
Dont you use sin theta something or other?
Or use an angle I mean.
Or use an angle I mean.
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