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6.2 Hooke’s Law
The 216-metre-high Gravity acts on all objects on the Earth. Objects move towards the
Bloukrans Bridge over centre of the Earth under the effect of this force. For example a ball,
the Bloukrans River in thrown upwards, automatically falls back to the ground. Suspended
South Africa attracts objects or objects placed on a surface do not fall to the ground.
textbooks nis edu kz
Supports or suspensions are deformed under the effect of the weight
bungee jumpers from
of such objects. This is because elastic force is pulling in the opposite
all over the world.
direction to gravity force in these objects. The effect of gravity force is
How does the bungee
balanced by the elastic force acting on objects.
cord’s shape change
before and after the INV Elastic force can be measured using a dynamometer. Determine
jump? Why is this how elastic force depends on the change in the length of a spring.
Study how different springs are stretched under the effect of the same
change important?
external forces. Write up the results of your observations.
The law governing the relationship between an elastic force and the
extension of an object was established by Robert Hooke, an English
scientist, in 1660. This law states that deformation occurring in an elastic
object is proportional to the force applied to this object.
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