iGCSE Physics - 1.5.1 Effects of Forces SUPPLEMENT

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Unit 1.5.1 Effects of Forces SUPPLEMENT
**

Define the spring constant as force per unit extension; recall and use the equation k = Fx

Define and use the term ‘limit of proportionality’ for a load–extension graph and identify this point on the graph (an understanding of the elastic limit is not required)

Recall and use the equation F = ma and know that the force and the acceleration are in the same direction

Describe, qualitatively, motion in a circular path due to a force perpendicular to the motion as:
(a) speed increases if force increases, with mass and radius constant
(b) radius decreases if force increases, with mass and speed constant
© an increased mass requires an increased force to keep speed and radius constant