Page 55 -
P. 55
6. Elastic forces
In Unit 5 you learnt:
Kazakhstani athlete Olga Rypakova
✔ what a force is, how it is denoted and what
was a gold medal winner in triple
units are used to measure it
jump at the London 2012 Olympics.
✔ how a force can affect how an object moves Physics
At the final of the competition, she
scored the best result by jumping ✔ how to measure the force of gravity and an
14.98 metres. Look at the image and object’s weight with a dynamometer
discuss the following questions:
In this unit you will learn:
a) What properties do you think ✔ what deformation is, about different types
Olga’s shoes must have? Key phrases:edu kz
of deformation, and to distinguish between
b) Why do you think Olga flexes her plastic and elastic deformation
feet and legs during the jump? ✔ about Hooke’s Law
textbooks nis
c) What happens to Olga’s shoes and ✔ to analyze elastic force vs deformation graphs
muscles the moment she lands?
✔ Elastic force appears … and depends on …
✔ Elastic force is directed … and applied to …
✔ Deformation occurs when …
✔ Spring coefficient depends on … and is
measured in …
✔ Elastic force is measured in …
CCL
● In Biology, you have learnt to describe and
explain musculoskeletal system functions; in
Physics lessons, you will understand what types
of deformation your body can experience.
● In Chemistry, you have learnt that a substance
consists of particles. A change in particle
arrangement leads to its deformation.
● In Maths, you have learnt about Cartesian
coordinates. This will help you to work with the
graph showing the dependence of an elastic
force on stretching.
55
