How do I resolve forces on a horizontal plane?

Announcements
    • Thread Starter
    Offline

    2
    ReputationRep:
    Two particles P and Q, of masses 5kg and 3kg respectively, are connected by a light inextensible string. Particle P is pulled by a horizontal force of magnitude 40N along a rough horizontal plane. The coefficient of friction between each particle and the plane is 0.2.

    What's equation do I need to use to resolve the forces?
    Offline

    3
    ReputationRep:
    (Original post by ℓove)
    Two particles P and Q, of masses 5kg and 3kg respectively, are connected by a light inextensible string. Particle P is pulled by a horizontal force of magnitude 40N along a rough horizontal plane. The coefficient of friction between each particle and the plane is 0.2.

    What's equation do I need to use to resolve the forces?
    Well so far there isn't a question.
    The formulae you will use are F=ma, friction(max)=coefficient x R and R=mg
    E.g. Considering P
    R = 5g
    Friction = 0.2x5g = 9.8 N
    Do the same for Q

    In terms of resolving forces the only forces opposing the 40N pulling force is the friction acting on each particle. Calculating the difference enables you to work out the effective force acting to pull the particles and deduce the acceleration using F=ma


    Posted from TSR Mobile
 
 
 
Write a reply… Reply
Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: September 25, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Today on TSR
Poll
Does your body insecurities make you avoid PE or exercise?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.