Forces & elasticity (Edexcel GCSE Physics): Flashcards
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Practise the cards
15 cards from this deck
Why is more than 1 force needed to deform an object?
Why is more than 1 force needed to deform an object?
A single force makes it move, not change shape
Direction of forces to stretch object
Direction of forces to stretch object
Opposite directions on either side
Define deformation
Define deformation
Change in shape due to applied forces
Define elastic deformation
Define elastic deformation
Returns to original shape after force removed
Define plastic deformation
Define plastic deformation
Doesn't return to original shape; permanent change
What transfers when object is deformed?
What transfers when object is deformed?
Energy
Define elastically distorted
Define elastically distorted
Returns to original shape & length after force removed
Define elastic limit
Define elastic limit
Point beyond which object won't return to original shape
Energy store when work done stretching object
Energy store when work done stretching object
Elastic potential energy store
Hooke's Law
Hooke's Law
Extension is directly proportional to force applied
If force doubles on spring, extension does what?
If force doubles on spring, extension does what?
Doubles (direct proportionality)
Define limit of proportionality
Define limit of proportionality
Limit where force-extension proportionality ends
What happens beyond limit of proportionality?
What happens beyond limit of proportionality?
Spring stretches more than expected for force applied
After elastic limit, can spring return to original?
After elastic limit, can spring return to original?
No, permanently stretched
Energy transfer in elastic distortion
Energy transfer in elastic distortion
ALL energy goes to elastic potential energy store