Science file has been returned to you today.
File in 2015 MCQ, 2015 Section B & 2014 MCQ papers.
Next Tuesday (1 Mar) Science Lesson
Bring back 2014 MCQ paper to go through Q22 to Q30.
Bring back 2015 Section B paper to go through Q43 & 44
Important reminders in your Science Revision
1. Gravitational Force vs Gravitational Potential Energy (MCQ 2014 paper: Q21)
- The amount of gravitational force acting on the javelin is the same at C, D and E. This force is constant as long as you're on earth.
- However, the gravitational potential energy will change.
- At C, it has greater gravitational potential energy & therefore lesser kinetic energy.
- At E, it will then have lesser gravitational potential energy as it is converted to greater kinetic energy.
- This is similar to the Roller Coaster Example, pg 24 in your Energy activity book.
2. Cause, Effect & Purpose (MCQ 2014 paper: Q20)
- In Surface D...
- Cause: Frictional Force between the wheels of the toy car & the surface of the ramp is the least.
- Effect: The toy car is observed to roll down the ramp the fastest. / The toy car took the shortest time to roll down the ramp.
- Purpose: (Applying the experiment in the context of the bathroom floor tiles) It is the least suitable for making the surface of bathroom floor tiles.
- This is similar to the pg 7, Question 2 in your Interaction activity book.
- Whenever question asks to "Explain why", you will need to have the Cause & Effect in your answer.
- Purpose will be needed when there is an application in another context.
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