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# Need help with maths questions watch

1. If you're given:
a = 2.5
u = 6
And told that you have to find the total distance, the particle of 0.5kg, reaches before it comes to rest. How do u find it?
2. S x
U 6
V 0
A 2.5
3. (Original post by Wiz_The_Bae)
If you're given:
a = 2.5
u = 6
And told that you have to find the total distance, the particle of 0.5kg, reaches before it comes to rest. How do u find it?
I normally write out what I know out of suvat so
s=?
u=6
v=0
a=2.5
t=

As you've got four including your unknown you can use v^2=u^+2as then sub in and rearrange.

I think that should work, although I haven't used the mass so I'm not sure :/
4. (Original post by Wiz_The_Bae)
If you're given:
a = 2.5
u = 6
And told that you have to find the total distance, the particle of 0.5kg, reaches before it comes to rest. How do u find it?
Are we given any more information about the particle? Is it on a slope or a horizontal surface? Is the surface it is on smooth or rough? If you could post the full question I would be in a much better position to help.
5. (Original post by Dannyboy2015)
Are we given any more information about the particle? Is it on a slope or a horizontal surface? Is the surface it is on smooth or rough? If you could post the full question I would be in a much better position to help.
Oh yeah, sorry. Well it's a particle of 0.5kg on a straight horizontal surface. The surface is rough, and has coefficient of friction 0.5. And they ask me to find:
(a) the frictional force acting on the particle.
(b) the retardation of the particle.
(c) given that it's initial speed is 6ms^-1, find the total distance the particle travels before it comes to rest.
6. Draw a free body diagram-->determine the normal reaction R-->determine the frictional force...then with the help of Sir Isaac (Newton) you will have the retardation of the particle
(Original post by Wiz_The_Bae)
Oh yeah, sorry. Well it's a particle of 0.5kg on a straight horizontal surface. The surface is rough, and has coefficient of friction 0.5. And they ask me to find:
(a) the frictional force acting on the particle.
(b) the retardation of the particle.
(c) given that it's initial speed is 6ms^-1, find the total distance the particle travels before it comes to rest.
7. I started drawing out a solution for you but then my pen ran out (genuinely, the equal sign next to the T is hardly visible). Anyway this should get you started hopefully. Oh and I'd suggest you see whether or not the particle is moving vertically, if it isn't then you know that the force pulling it down is equal to the force pulling it up. Good Luck!
Spoiler:
Show
8. well, I got confused: Is retardation(deceleration) given or not?
What's the reason for drawing a forward force? I mean this forward force is exerted on the particle by whom/what?
9. (Original post by depymak)
well, I got confused: Is retardation(deceleration) given or not?
What's the reason for drawing a forward force? I mean this forward force is exerted on the particle by whom/what?
I didn't know at first but i managed to use the F=Ma equation to find accelaration which i think is the retardation. I got a = 2.5ms^-2
10. (Original post by Dannyboy2015)
I started drawing out a solution for you but then my pen ran out (genuinely, the equal sign next to the T is hardly visible). Anyway this should get you started hopefully. Oh and I'd suggest you see whether or not the particle is moving vertically, if it isn't then you know that the force pulling it down is equal to the force pulling it up. Good Luck!
Spoiler:
Show
Ah nice, thankyou

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