Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hey,

    I think this question is easy but for some reason I can't get my head around it. As far as I know t = 0 here.

    Nathan hits a tennis ball straight up into the air from a height of 1.25m above the ground. The ball hits the ground after 2.5 seconds. Assuming g = 10ms^-2, find

    (i) the speed Nathan hits the ball

    h = ?
    h0 = 1.25
    g = -10
    v = ?
    u = ?
    t should = 0 I think.

    So what do I do to solve it? Am I meant to solve it simulataineously to find both the variables v and u somehow?

    Please help.

    Thanks.
    Offline

    1
    ReputationRep:
    Draw a diagram - there are three stages to the ball's movement

    1. Going up from 1.25m to its maximum height
    2. Going down from maximum height to 1.25m
    3. Going from 1.25m to 0m (the ground)

    NOTE I have split the ball's journey into these three stages because stage one and two take the same amount of time to happen, as the ball travels the same distance

    Use UVAST separately on each of the three stages (start with stage 3 and work out the time it takes, then subtract this from 2.5 (the total time) and remember that stage 1 and 2 take the same amount of time)
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 11, 2009

University open days

  • University of Bradford
    All faculties Undergraduate
    Wed, 21 Nov '18
  • Buckinghamshire New University
    All Faculties Postgraduate
    Wed, 21 Nov '18
  • Heriot-Watt University
    All Schools Postgraduate
    Wed, 21 Nov '18
Poll
Black Friday: Yay or Nay?
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

Equations

Best calculators for A level Maths

Tips on which model to get

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.