Definitions
True or False
Apply the formula
About the formula
Random
100
What is the extension of a spring? (give a definition)
the length of the spring. How much longer or shorter it is after force was applied to it
100
Hooke experimented with rubber bands when he came up with Hooke's law. True or False?
False. He worked with springs and wires
100
What are the units for F, k, and x?
F= N, k=N/m, x=m
100
What is the formula for Hooke's law?
F=Kx
100
Give three examples of objects that have restoring force
spring, rubber band, hair tie, slinky
200
What is a spring constant? (give a definition)
Some materials are stiffer than others. A spring constant controls how easily a material can be stretched
200
If you apply double the force to a spring, the displacement will be double as much. True or False?
True
200
How much force would it take to stretch a steel bar with a spring constant of 21000 N/m until it is 0.001 m longer?
21N
200
What does the F, K and x stand for?
F= force k= spring constant x= displacement
200
Which of the following has restoring force? plastic, play-doh, rubber band
rubber band
300
What is restoring force?
When a spring has the ability to go back to its original shape after being pulled or contracted
300
If you inflate a balloon and then take the air out, you will observe that you have gone beyond the elastic limit of the balloon. True o False?
True
300
What is the spring constant of a car spring if a 2500N force compresses it from a length of 5m to a length of 3m?
1250 N/m
300
If you apply twice as much force to a spring, will you expect its displacement to be twice as much or four times as much?
twice as much
300
Assume that you applied 2N of force to a spring and the displacement was 10m. If you apply 4N of force, what will your displacement be?
20m (force and displacement is proportional. If you double the force, your displacement will be doubled as well)
400
What is the elastic limit of a spring?
How much you can stretch a spring before it deforms. (it's the maximum extension of a spring)
400
The stretchier a material is, the larger the spring constant is. True or False?
False. The stiffer a material is, the larger the spring constant is.
400
How much force is required to compress a 20m long spring to 15m if the spring constant is 30 N/m?
150N
400
Imagine you have two springs A and B. If A is stiffer than B, will you expect A's spring constant to be larger or smaller than B's?
larger
400
What is elastic behavior?
when a spring is stretched and it is able to go back to its original shape
500
What is Hooke's Law? (definition)
- The extension is proportional to the force - The spring will go back to its original length when the force is removed as long as we don’t exceed the elastic limit
500
If a spring goes beyond its elastic limit, we say that a spring is showing elastic behavior. True or False
False. the spring is showing plastic behavior
500
If John lays on a mattress with a force of 10N and the spring constant is 2 N/m, what is the displacement of the springs in the mattress?
5m
500
What is the difference between F=kx and F= -kx?
The positive is talking about the force applied and the negative is talking about the restoring force. The sign just indicates you the direction of the force
500
What is plastic behavior?
when a spring is stretched and it deforms.
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