Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    12
    ReputationRep:
    This is a past paper question from M1 OCR Jan 2005. Q.1
    A box of weight 100 N rests in equilibrium on a plane inclined at an angle α to the horizontal. It is given that sin α = 0.28 and cos α = 0.96. A force of magnitude P N acts on the box parallel to the plane in the upwards direction (see diagram). The coefficient of friction between the box and the plane is 0.25.

    (i) Find the magnitude of the normal force acting on the box.

    How do i find the magnitude of the normal force? Is there a specific formula?
    Offline

    8
    ReputationRep:
    Below
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    8
    ReputationRep:
    (Original post by Chelsea12345)
    This is a past paper question from M1 OCR Jan 2005. Q.1
    A box of weight 100 N rests in equilibrium on a plane inclined at an angle α to the horizontal. It is given that sin α = 0.28 and cos α = 0.96. A force of magnitude P N acts on the box parallel to the plane in the upwards direction (see diagram). The coefficient of friction between the box and the plane is 0.25.

    (i) Find the magnitude of the normal force acting on the box.

    How do i find the magnitude of the normal force? Is there a specific formula?
    Just resolve it, so the weight is 100N, therefore the force acting on the box due to the weight is going to be 100cos(angle) which is 100x0.96 which is 96N.

    The normal reaction force is just R, which acts perpendicular to the box, since it’s in equilibrium, and not moving, that force must equal the magnitude of the resolved weight perpendicular to the box, acting downwards.
    Posted on the TSR App. Download from Apple or Google Play
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 7, 2018
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

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

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