URGENT! Need EPI ideas!

[Deceitful Wings]

Please list any ideas which are practical, effective in obtaining results and relatively cost effective
These ideas could help others!

[Hutchoo]

Also interested!

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[Phy124]

Assuming EPI = Extended Practical Investigation, what exactly are you investigating? i.e. is this for motion, detailed study etc.

[Deceitful Wings]

Motion

[yawho]

Simple pendulum: Effects of the length of the pendulum, mass of the bob, and amplitude of the swing on the period of the pendulum.

[abd123]

I done a prac with my mate last year. We calculated the friction force through using a cardboard at the end of the table making it give the rough surface and using dynamic carts along with the string acting as a tension and additional constant mass of 150 grams (if i can remember) being attached to the dynamic cart. We too had to calculate the tension :S.

Pretty complicated though, but me and him gotten an A+ for it.

I am going to do the exact same thing again with my friend again . No pun intended 

[yellowsone31]

what could you do as an EPI for materials and structures (detailed study) ?

Thanks

[rife168]

Just some examples our teacher gave us.
Also think about perhaps something to do with springs and transfer of energy etc. (there are no examples like this below)

I also think that something to do with a pendulum would be a good experiment to carry out.


 - Box sliding down Inclined plane   Aim: Find µ for varying angles and masses in the box.

 - Bouncing a ball from different heights & finding coefficient of restitution.   Coefficient of restitution (R) will not be constant Investigate why R varies in terms of energy loss. Find how initial height affects this.

 - Projectile motion   Aim to predict range from initial energy.
1.   Fire several different small projectiles on a level surface using the piston in a dynamics trolley. Hookes law  Ep  Ek.
2.   Allow a ball to roll down a track & project level over some drop. Does the Ep gain = Ek according to projectile theory.
Differences between theory & reality, comment on air resistance.

 - Tipping points on box   Measure force as a box is tipped over. At what is relationship between f & θ & m   θ, F, m, centre of mass (Cm)

 - Energy efficiency of collisions (Newtons cradle)   Allow 1 ball to collide repeatedly until a measurable drop in energy occurs. Repeat with 2 and 3 balls.
What is the energy loss per collision? How does this change if 2, 3 balls are moving at once?

 - Elasticity of collisions   Collide one trolley into another & measure changes in p and Ek.
1.   Change the masses loaded onto 2 dynamics trolleys to see if this affected the elasticity of the collision. Keep speed of collision const.
2.   Keep masses constant and vary speed of collision.   Ek, p, m, v
Circular motion   Aim: to predict the minimum height needed for a ball/ toy car to make it around a vertical loop.   Ep, Ek, v, F

[DisaFear]

Our one was...

Plank of wood. Fulcrum in the middle (adjusted later on). One end is clamped to a spring (two differing springs used) and one end pulls a weight
That's all I remember, can't remember what we calculated. Something to do with the wood, spring constants and the fulcrum positions

[Phy124]

This was a draft of one of my motion experimental reports (excluding results,observations etc.), I haven't checked the wording but I don't think I would have saved it if it had any major mistakes.

SAC 1 (YR 12 PHYSICS) Momentum Experimental Report

AIM:    

   To investigate momentum changes before, during and after a collision in one dimension.

EQUIPMENT/MATERIALS:

   - Plasticine
   - Table(s)
   - Sticky tape
   - Cart1 – 1.95kg*
   - Cart2 – 1.30 kg*
   - Chair(s)
   - Ticker-timer
   - 12V Power supply
   
* Alternate masses may be used

METHOD:

1.   Gather equipment/materials stated above
2.   Place plasticine on the front of Cart1 and on the back of Cart2
3.   Lay one table flat and another angled against it, using a chair to leaver one end of the table.
4.   Put plasticine on the join of the tables and tape over to make the surface smoother.
5.   Place the ticker-timer at the top end of the slanted table and put tape through it, then attach to a 12V power supply.
6.   Place Cart 1 approximately 10cm from the ticker timer and attach ticker-timer tape to the back of the cart. Also, mark the spot where you plan to launch the cart from on the table.
7.   Place Cart 2 on the horizontal table and align with Cart 1 so a collision may occur.
8.   Turn on the power supply so that the ticker-timer is activated.
9.   Launch Cart 1 and examine the ticker-timer tape on completion.
10.   Measure the distance between the ticker-timer dots and observe whether a constant velocity has been achieved. If a constant velocity has not been achieved, alter the angle of the table accordingly to compensate and run another trial.
See diagram 1.2 for diagram of setup

what could you do as an EPI for materials and structures (detailed study) ?

Thanks

Same explanation as above, but for Structures & Materials.

Structures and Materials Experiment – Young’s Modulus

Aim: To investigate the stress verses strain characteristics of different metals, and to calculate the Young’s Modulus for each.

Equipment:

-   Table
-   Clamp
-   Wood block
-   Pulley
-   Hooked masses (1kg, 500g, 100g)
-   Marker
-   Sticky tape
-   Copper wire
-   Fuse wire
-   Ruler(s)
-   Scissors

Method:

1.   Measure each of your wires to a length of approximately 1.5 – 2m and cut them.
2.   Place your first wire on the table and place a block of wood over the top of it.
3.   Clamp the wood the table, ensuring the wire is wrapped around the clamp several times, and is secure.
4.   Place a pulley at the other end of the table and clamp it
5.   Run the wire through the clamp.
6.   Mark a certain distance from the clamp on the table and your wire and record this.
7.   Add masses 500g or 1kg at a time for Copper and 100g at a time for fuse wire.
8.   Measure the change in length from your original marker.
9.   Measure the diameter of the wire.
10.   Repeat steps 7-9, recording observations in the table given.

Found this picture of the set up also - http://i43.tinypic.com/91mgxg.png

edit: added link for picture

[yellowsone31]

This was a draft of one of my motion experimental reports (excluding results,observations etc.), I haven't checked the wording but I don't think I would have saved it if it had any major mistakes.

SAC 1 (YR 12 PHYSICS) Momentum Experimental Report

AIM:    

   To investigate momentum changes before, during and after a collision in one dimension.

EQUIPMENT/MATERIALS:

   - Plasticine
   - Table(s)
   - Sticky tape
   - Cart1 – 1.95kg*
   - Cart2 – 1.30 kg*
   - Chair(s)
   - Ticker-timer
   - 12V Power supply
   
* Alternate masses may be used

METHOD:

1.   Gather equipment/materials stated above
2.   Place plasticine on the front of Cart1 and on the back of Cart2
3.   Lay one table flat and another angled against it, using a chair to leaver one end of the table.
4.   Put plasticine on the join of the tables and tape over to make the surface smoother.
5.   Place the ticker-timer at the top end of the slanted table and put tape through it, then attach to a 12V power supply.
6.   Place Cart 1 approximately 10cm from the ticker timer and attach ticker-timer tape to the back of the cart. Also, mark the spot where you plan to launch the cart from on the table.
7.   Place Cart 2 on the horizontal table and align with Cart 1 so a collision may occur.
8.   Turn on the power supply so that the ticker-timer is activated.
9.   Launch Cart 1 and examine the ticker-timer tape on completion.
10.   Measure the distance between the ticker-timer dots and observe whether a constant velocity has been achieved. If a constant velocity has not been achieved, alter the angle of the table accordingly to compensate and run another trial.
See diagram 1.2 for diagram of setup

what could you do as an EPI for materials and structures (detailed study) ?

Thanks

Same explanation as above, but for Structures & Materials.

Structures and Materials Experiment – Young’s Modulus

Aim: To investigate the stress verses strain characteristics of different metals, and to calculate the Young’s Modulus for each.

Equipment:

-   Table
-   Clamp
-   Wood block
-   Pulley
-   Hooked masses (1kg, 500g, 100g)
-   Marker
-   Sticky tape
-   Copper wire
-   Fuse wire
-   Ruler(s)
-   Scissors

Method:

1.   Measure each of your wires to a length of approximately 1.5 – 2m and cut them.
2.   Place your first wire on the table and place a block of wood over the top of it.
3.   Clamp the wood the table, ensuring the wire is wrapped around the clamp several times, and is secure.
4.   Place a pulley at the other end of the table and clamp it
5.   Run the wire through the clamp.
6.   Mark a certain distance from the clamp on the table and your wire and record this.
7.   Add masses 500g or 1kg at a time for Copper and 100g at a time for fuse wire.
8.   Measure the change in length from your original marker.
9.   Measure the diameter of the wire.
10.   Repeat steps 7-9, recording observations in the table given.

Found this picture of the set up also - http://i43.tinypic.com/91mgxg.png

edit: added link for picture

Thanks so much... you're amazing!