Force Constant Of Rubber Band

The rubber band that stretches the least for a given weight applied force has the greatest spring constant.

Force constant of rubber band.

For example if the pegs are placed such that the band is stretched to 52 inches the force the bands apply to the pegs are 57 6 lbs per inch. The greater the weight the. If you had rubber bands of the same cross sectional area then the one that stretches the least also has the greatest elastic modulus. The minus sign shows that this force is in the opposite direction of the force that s stretching or compressing the spring.

A rubber band is a single molecule as is a latex glove. Individual 4 carbon backbone units are forced into rotational conformations that have longer end to end distances and this restricts the number of conformations states that are thermally accessible. The ultimate strength is measured by breaking the material. F which represents force k which is called the spring constant and measures how stiff and strong the spring is and x is the distance the spring is stretched or compressed away from its equilibrium or rest position.

The elongation of the rubber band is the product of these two forces this you measure with a ruler. Since we heated the band up h q 0. The variables of the equation are. The tension in the rubber band is the component of these two forces.

In this case the linear function fitting the straight part of the data gives a spring constant of 17 38 n m. If i assume that i could also rotate this one. Say i have a rubber band wrapped around 2 pegs at a certain distance and at that distance i know the pounds of force per inch it is pulling at. H e pv fd è q w pv fd if we heat the rubber band with a weight attached the force f is constant but the band contracts.

The work w is f d p v the p v term is very small and h q f d p v f d p v q. After you get the rubber band stretched just a little bit it is very spring like. When a rubber band is stretched some of the network chains are forced to become straight. Hooke s law and elastic potential.

When the rubber band is pulled by a force of 9 8 n how far will it stretch and what is its potential energy.