49. A vertically hung 0.50-meter- long spring is stretched from its equilibrium position to a length of 1.00 meter by a weight attached to the spring. If 15 joules of elastic potential energy are stored in the spring , what is the value of the spring constant?

Explanation:

From the question we are told that

Length of spring  

Length of stretched

Potential energy of spring

Generally equation for energy stored is mathematically given as

Therefore value of the spring constant in N/m? is given as

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

battery with hi vtge high val resist in series