Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    7
    ReputationRep:
    'At time t=0, a body is projected from an origin O with an initial velocity of 10ms-1. The body moves along a straight line with a constant acceleration of -2ms-2.
    A) Find the displacement of the body from O when t equals 7 seconds
    B) how far from O does the body come to instantaneous rest and what is the value of t then?
    C) find the distance travelled by the body during the time interval t=0 to t=7 seconds.

    I've solved parts A and B and gotten 21m for A and 25m and 5 seconds for B, but I don't know how to get C. Can someone explain how to get this and also explain how it's different from part A?
    • Very Important Poster
    Online

    21
    ReputationRep:
    Very Important Poster
    (Original post by Carokelly123)
    'At time t=0, a body is projected from an origin O with an initial velocity of 10ms-1. The body moves along a straight line with a constant acceleration of -2ms-2.
    A) Find the displacement of the body from O when t equals 7 seconds
    B) how far from O does the body come to instantaneous rest and what is the value of t then?
    C) find the distance travelled by the body during the time interval t=0 to t=7 seconds.

    I've solved parts A and B and gotten 21m for A and 25m and 5 seconds for B, but I don't know how to get C. Can someone explain how to get this and also explain how it's different from part A?
    What's the difference between displacement and distance travelled? (Think about part b, your answer to it and how it all ties in).
    Offline

    3
    ReputationRep:
    (Original post by Carokelly123)
    'At time t=0, a body is projected from an origin O with an initial velocity of 10ms-1. The body moves along a straight line with a constant acceleration of -2ms-2.
    A) Find the displacement of the body from O when t equals 7 seconds
    B) how far from O does the body come to instantaneous rest and what is the value of t then?
    C) find the distance travelled by the body during the time interval t=0 to t=7 seconds.

    I've solved parts A and B and gotten 21m for A and 25m and 5 seconds for B, but I don't know how to get C. Can someone explain how to get this and also explain how it's different from part A?
    A says displacement C says distance
    • Thread Starter
    Offline

    7
    ReputationRep:
    So it travelled 25m at t=5, then it must have went back 4m to 21m at t=7, making the answer 29m?
    Offline

    3
    ReputationRep:
    (Original post by Carokelly123)
    So it travelled 25m at t=5, then it must have went back 4m to 21m at t=7, making the answer 29m?
    sounds about right
 
 
 
  • See more of what you like on The Student Room

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

  • Poll
    Brussels sprouts
    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
  • See more of what you like on The Student Room

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

  • 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.