Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hey, I have a bit of unfinished work from my Physics lesson a few weeks back (I'm going through my folder) however, my mind has gone pretty blank as it was a few weeks ago like I said.
    I think I have to put newtons laws into my answers...

    1. Explain why a raindrop falling vertically through still air reaches a constant velocity.
    It's worth 4 marks. I know that the forces become balanced and blah blah, but I don't know how to get 4 marks? And I think we have to put newtons laws in there aswell.

    2. An apple and a leaf fall from a tree at the same instant. Both apple and leaf start at the same height above the ground but the apple hits the ground first. Use Newton's laws of motion to explain why...
    i) The leaf accelerates at first then reaches a terminal velocity

    ii) the apple hits the ground first
    worth 5 marks.

    Again I have a rough idea, but I'm unsure how to get 5 marks and how to include newtons laws into the answer.
    Thanks!
    Offline

    0
    ReputationRep:
    Split it down into each different "phase" if you like, and apply Newton's laws to each of them along with your explanation.
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hmm, I still can't really get an answer. Thanks though!
    Offline

    9
    ReputationRep:
    You need to talk about the forces acting, how they change an what happens to the resultant force.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 9, 2008

2,809

students online now

800,000+

Exam discussions

Find your exam discussion here

Poll
Should predicted grades be removed from the uni application process

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.