with mr mackenzie
standard grade physics is in here
We finished the Energy Matters topic last week. Here are some notes with worked examples to show how we calculate the heat energy required to change the state of matter. Values of Lf and Lv are provided inside the front cover of a question paper.
We’ll finish off the course by looking at Space Physics.
We finished the transport section with a look at Work, Potential & Kinetic energy. Those of you aiming for Credit need to carry out calculations involving kinetic energy using
Here is a video about work, potential energy & kinetic energy from Bozeman Science
Most of the calculations will be based on the principle of conservation of energy. Dr. Altman has an excellent series of videos examining conservation of energy examples from Roadrunner cartoons.
I have attached a pdf handout with worked examples on potential energy, work and kinetic energy. If you want some more revision materials, try here.
Here are some videos on balanced and unbalanced forces affecting the motion of objects. The first clip examines the forces on a cyclist as she cycles round a velodrome.
The second clip looks at the way skydivers use forces to land safely.
I’ve also attached a pdf with some notes on forces, free body diagrams and Newton’s laws of motion. Download the file using the link below.
We’ve been learning about forces in class and today we looked at how car seatbelts use forces to keep us safe. Mr Mallon’s HelpMyPhysics site has a short video that demonstrates how a monkey can stay safe during a trolley collision when it is given a seatbelt.
Here is a seatbelt advert from Sussex, the family’s arms show what a seatbelt does.
The next youtube seatbelt advert is pretty graphic – it’s designed to show what happens to our insides when we travel without a seatbelt. Here is a link to the video, please don’t click if you’re squeamish.
There are several pages of notes about forces on BBC Bitesize. Remember to try their test when you have worked through the topic.
I have attached a pdf from RoSPA that provides a history of the car seatbelt. Ignore the bad man who was the face of seatbelt campaigning in the 1970s…
Your homework exercise on resistance is attached as a pdf document. Download the file and answer the questions in your homework jotter. Hand in your jotter no later than Monday 17/12/12.
