Year 10 Pathway C Mr. D. Patterson 1

 Refer to weight as a force  Use F=ma to calculate weight on Earth and other planetary bodies 2

 A force is a push or pull which may: ◦ A) Change the shape of an object ◦ B) Change the velocity of an object 3

 What do bathroom scales measure?  What are the units?  How does it measure this? 4

 Your mass is a measure of the quantity of matter inside you. If, on Earth, your mass is 50 kg then in space your mass is 50 kg  Weight is a force. It is the pulling force caused by gravity. In space, you have no weight. Weight is measured in Newtons. 5

 What falls faster; a feather or a hammer?  Why?  The answer is not because the hammer is heavier. It is because air resistance affects the feather more.  On the moon there is no air resistance.... 6

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 The rate at which objects fall does not depend on the mass of the objects.  On Earth, objects fall with an acceleration of 9.8 ms-2  To calculate the weight of an object:  F = ma = mg = m x 9.8 8

 1. What is the weight of Mr. Patterson, who has a mass of 80 kg?  2. What is the mass of a litre of water on the moon if its weight is 1.63 N? The acceleration on the moon is 1/6 th of Earth 9

 Refer to weight as a force  Use F=ma to calculate weight on Earth and other planetary bodies  Matthew and Winters Set 17 10