Tuesday, 18 October 2011

Acceleration as a vector quantity / Newton's Laws and forces

On Monday we learned about acceleration as a vector quantity. Acceleration is defined as the rate of change of velocity. We learned that you can find acceleration by using the formula a= change in velocity/change in time. We used this formula to do a question about a race car and then a text book question.

On Tuesday we started unit 3 which started off with Newton's Laws which explain the relationship between acceleration and force.

After talking about this we took notes on 4 forces.
1. Applied Force - force applied to an object.

2. Force of Gravity - the force that attracts things to itself.

3. Normal Force - force that is put on an object that is in contact with another object.

4. Friction Force - the force exerted by a surface an object moves on.

Once we discussed these we put them all together onto graphs called free body diagrams that show all the forces that acted on the object in the picture.

u2l2c1.gif

Berger is next.

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