Login

Search the forums now!

Welcome, Guest. Please login or register.

October 21, 2025, 08:52:42 pm
Pages: [1]   Go Down

Author Topic: Specialist help needed  (Read 2001 times)  Share 

0 Members and 1 Guest are viewing this topic.

23serenity

  • Trailblazer
  • *
  • Posts: 29
  • Hi I am nathan
  • Respect: +1
Specialist help needed
« on: August 28, 2016, 08:48:35 pm »
0
Was wondering if i can get help for spesh .

How would i find forces without a given acceleration and only a given initial velocity ?

Something to do with simultaneous  equations ? This question is based on an inclined surface at 30 degrees with a mass of 15g and coeff. Of friction of 0.23 .

Pls help
Logged

Peanut Butter

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 285
  • Respect: +28
Re: Specialist help needed
« Reply #1 on: August 28, 2016, 09:06:49 pm »
0
Does the question say that the velocity is constant?

If so, constant velocity = no acceleration = Fnet of 0 :)
Logged

23serenity

  • Trailblazer
  • *
  • Posts: 29
  • Hi I am nathan
  • Respect: +1
Re: Specialist help needed
« Reply #2 on: August 28, 2016, 09:18:27 pm »
0
Quote from: Peanut Butter on August 28, 2016, 09:06:49 pm
Does the question say that the velocity is constant?

If so, constant velocity = no acceleration = Fnet of 0 :)

Acceleration is not constant here. Would you know a way how to solve this if constant acc is not the case ?

How is simultaneous equations even obtained from this !!?
Logged

Peanut Butter

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 285
  • Respect: +28
Re: Specialist help needed
« Reply #3 on: August 28, 2016, 09:26:32 pm »
0
Hmm could you tell me the exact question so that I can point you in the right direction? :)
Logged

23serenity

  • Trailblazer
  • *
  • Posts: 29
  • Hi I am nathan
  • Respect: +1
Re: Specialist help needed
« Reply #4 on: August 28, 2016, 09:39:05 pm »
0
Quote from: Peanut Butter on August 28, 2016, 09:26:32 pm
Hmm could you tell me the exact question so that I can point you in the right direction? :)

Unfortunately I don't, I grabbed this question from a practice sac but did not jot down the exact question :(((


All i can tell you is that it's a mass on an inclined surface with friction , as stated previously.  It was approx 8marks so certainly requires alot of thinking. I recall the question asking something like : Determine the force to pull up the mass .

I know for sure however it's got to do with simultaneous eq .

Maybe Concurrent forces??but I have not seen that in the course for 2016 tho.

Sorry , it's not clear , but thank you for your time .
Logged

call.me.blueberry

  • Fresh Poster
  • *
  • Posts: 4
  • Respect: 0
Re: Specialist help needed
« Reply #5 on: September 30, 2016, 12:46:15 pm »
+1
Quote from: 23serenity on August 28, 2016, 08:48:35 pm
Was wondering if i can get help for spesh .

How would i find forces without a given acceleration and only a given initial velocity ?

Something to do with simultaneous  equations ? This question is based on an inclined surface at 30 degrees with a mass of 15g and coeff. Of friction of 0.23 .

Pls help

In this question I think they're asking for the NET force. If so go to this link for my solution:
https://s21.postimg.org/3xe7ksdxj/image.png


From the NET FORCE, you can find the acceleration, which is a = Net force/ m


In the case where an external FORCE is APLLIED, add it to the whole equation
and likewise, find the acceleration from it
« Last Edit: September 30, 2016, 12:47:54 pm by call.me.blueberry »
Logged
2016: Chem | Methods | EAL | Spesh | UMEP Maths
Pages: [1]   Go Up