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Different Methods for Physics Experiments?

  1. Jan 21, 2013 #1
    Hi, I'm new on this forum and don't really know how to use it, but I really need help

    I need to figure our 2 different experiment methods to answer these questions:
    -if an object is launched vertically, what was the initial velocity?
    -if an object is launched horizontally, what was the initial velocity?
    -what is the speed of a vehicle moving in constant motion? (already thought of the kinematics method, so I only need 1 other method)
    -if an object is attached on a string and is being spun in a vertical circle, what is the minimum speed to keep it moving in a circle?
    -if an object is on a turntable, what is the max speed without it slipping off?

    I need to make 2 experiments (different methods) each in order to answer these questions. Please help! Thanks!
     
  2. jcsd
  3. Jan 21, 2013 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF.

    What are the various "experimental methods" that you can choose from?

    Please tell us your best answers for each experiment, and we can offer tutorial hints. When you show no effort, we cannot help you (that's in the PF Rules link at the top of the page).
     
  4. Jan 21, 2013 #3
    Hi, sorry I should have listed my ideas
    We have learned kinematics, newton's laws, work, centripetal force, friction in class
    (These are the methods we are allowed to use)

    My ideas so far (i'm not sure if they will work though):
    -if an object is launched vertically, what was the initial velocity?
    shooting a projectile from a spring cannon vertically, and measuring the time it takes to reach the ground. Use kinematics to determine initial velocity

    -if an object is launched horizontally, what was the initial velocity?
    Place a ramp at the end of the table with a clamp, measure the height of a table, drop a ball from the ramp and record the time it takes to reach the floor. Use kinematics.

    -what is the speed of a vehicle moving in constant motion? (already thought of the kinematics method, so I only need 1 other method)
    measure distance traveled, use a stopwatch to time the amount of seconds it takes toreach the end point. use kinematics to determine velocity.

    -if an object is attached on a string and is being spun in a vertical circle, what is the minimum speed to keep it moving in a circle?
    measure the radius, and use Fg=Fc to determine velocity

    -if an object is on a turntable, what is the max speed without it slipping off?
    measure radius, use Fc=Fg to determine velocity

    Materials allowed to be used:
    meter stick, ruler, balls, block of wood with hook, clamps, constant motion vehicle, curved ramp, spring cannon, balance, tape, weights, pulley, force sensor, motion sensor, photogates, plumb line, protractor, ring stand, item attached to string, spring scale, turntable
     
  5. Jan 21, 2013 #4

    berkeman

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    Staff: Mentor

    Your answers sound fine to me. Do you need more experiments?
     
  6. Jan 21, 2013 #5
    Yes, I need two methods for each question.
    I would be grateful if you would be able to help!
     
  7. Jan 22, 2013 #6

    berkeman

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    Staff: Mentor

    What are your thoughts? You are doing great so far!
     
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