What type of force is a slinky?
the gravitational force
From the whole slinky point of view, there is only one force on the slinky – the gravitational force. This means that it falls and accelerates downward with an acceleration of -9.8 m/s2 just like all free-falling objects.
What is the science behind the slinky?
Held from midair, the Slinky stretches out, quickly reaching a condition known as “equilibrium.” in which the downward force of gravity is balanced by the upward tension of the coils above it. When the top is released, the bottom stays suspended. The top of the Slinky collapses, so that the coils slam into each other.
Why does a slinky hover when dropped?
As they meet the collapsed slinky then moves towards the ground. This happens because the bottom end has balanced forces acting upon it (gravity pulling it down and tension in the spring pulling it up). Only when the top meets the bottom does the change in force make the whole slinky move downwards.
Does a slinky obey Hooke’s Law?
Once you are pulling harder than the pre-tension, a slinky will behave as Hooke’s Law predicts until you reach its elastic limit. So a modified Hooke’s Law for a slinky (or any tension spring that completely collapses) looks like this: F −Fp = −kx, where Fp is the amount of pre-tension.
How does a slinky work physics?
As the slinky moves down the steps, energy is transferred along its length in a longitudinal or compressional wave, which resembles a sound wave that travels through a substance by transferring a pulse of energy to the next molecule. How quickly the wave moves depends on the spring constant and the mass of the metal.
Is a slinky a transverse wave?
In a transverse wave, the particles are displaced perpendicular to the direction the wave travels. Examples of transverse waves include vibrations on a string and ripples on the surface of water. We can make a horizontal transverse wave by moving the slinky vertically up and down.
How does a Slinky work physics?
Why does the bottom of the Slinky not fall?
You are absolutely correct that the bottom of the slinky does not move because the tension of the rest of the slinky pulling up balances the force due to gravity pulling down until the moment that the slinky is fully compressed and the whole thing falls with the acceleration due to gravity.
Why do slinkys not fall?
Does slinky defy gravity?
Slow motion footage of a falling slinky shows very curious behaviour. The slinky appears to defy gravity. The bottom of the slinky remains stationary, suspended in mid-air until the coils have fully collapsed.
How many coils are in a Slinky?
Each was 21⁄2″ tall, and included 98 coils of high-grade blue-black Swedish steel. The Jameses had difficulty selling Slinky to toy stores but, in November 1945, they were granted permission to set up an inclined plane in the toy section of Gimbels department store in Philadelphia to demonstrate the toy.
How do springs work physics?
Hooke’s Law: The Physics of Springs Hooke’s Law states that the more you deform a spring, the more force it will take to deform it further. Using the example of a common compression spring, the more you compress the spring, the more force it will take to compress it further.
What can you learn from slinky physics?
Amazing Slinky physics. The Slinky is a simple toy, consisting of nothing more than a helical spring made of metal or plastic. Simple it may be, but don’t underestimate the scientific principles at play; you’ll learn a lot about a range of forces by playing with this toy.
How to find the position and motion of a slinky?
The position and motion of the Slinky is described by giving the location y(d,t) of all points d of the slinky as functions of time t. [3] For the hanging slinky, we find y 0(d), which is static and not dependent on t. Above a certain point d 1 the Slinky behaves like a loosely wound spring according to the equation.
How does a slinky work?
The Slinky can perform a number of tricks. It stretches and reforms itself with the help of gravity. A Slinky will stay at rest without moving at all if placed on the floor or at the top of the stairs due to the resistance to change in its motion. But we notice that once it has started to fall down the stairs, gravity affects it.
How does gravity affect a slinky’s movement?
Gravity and the momentum from the Slinky itself differs depending on the angle of travel. If the Slinky walks down a steep slope, such as a staircase, it travels faster because gravity pulls it down with greater force. When the Slinky walks down a gentler slope, it will move more slowly, but will walk farther because the momentum is steady.