# mechanic 1 edexcel helpWatch

Announcements
#1
when do you put =MA at the end? Sounds like a silly question but im just a bit confused! thanks
0
4 years ago
#2
(Original post by s234590)
when do you put =MA at the end? Sounds like a silly question but im just a bit confused! thanks
I'm not sure what you mean - where have you seen this before?
0
4 years ago
#3
You find the resultant force by resolving and if the resultant force has an unknown you put F(resultant)=MA and insert the acceleration and mass to find unknown; for example the coefficient of friction. Or you do it the other way round, for example you're trying to find the acceleration you put the resultant force and mass into equation, rearrange and viola.
1
#4
(Original post by SeanFM)
I'm not sure what you mean - where have you seen this before?
Wasnt very well explained sorry.

You see you have questions where you have to resolve the forces because they are at an angle how comes sometimes when you resolve you =ma
and sometime you just pick a positive direction and make for example the horizontal equal to eachother.

Does that make more sense?
0
4 years ago
#5
(Original post by s234590)
Wasnt very well explained sorry.

You see you have questions where you have to resolve the forces because they are at an angle how comes sometimes when you resolve you =ma
and sometime you just pick a positive direction and make for example the horizontal equal to eachother.

Does that make more sense?
Hmm. A specific example or exam question would be helpful to see where you're getting stuck, but when you're resolving forces you find the resultant force on the mass - which is given by MA.
1
4 years ago
#6
(Original post by s234590)
Wasnt very well explained sorry.

You see you have questions where you have to resolve the forces because they are at an angle how comes sometimes when you resolve you =ma
and sometime you just pick a positive direction and make for example the horizontal equal to eachother.

Does that make more sense?
If the object is in equilibrium in the direction you're taking, resolve the forces. If it's not in equilibrium in the direction, i.e. you have a resultant force, F=ma, and plug in numbers
0
#7
(Original post by devangdave)
If the object is in equilibrium in the direction you're taking, resolve the forces. If it's not in equilibrium in the direction, i.e. you have a resultant force, F=ma, and plug in numbers
Thank you this makes sense !!
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Cardiff Metropolitan University
Sat, 19 Oct '19
• Coventry University
Sat, 19 Oct '19
• University of Birmingham
Sat, 19 Oct '19

### Poll

Join the discussion

#### Why wouldn't you turn to teachers if you were being bullied?

They might tell my parents (26)
7.01%
They might tell the bully (35)
9.43%
I don't think they'd understand (56)
15.09%
It might lead to more bullying (145)
39.08%
There's nothing they could do (109)
29.38%