The force F required to compress a spring a distance x is given by F F k x − = 0 where k is the spring constant and F0 is the preload. Determine the work required to compress a spring whose spring constant is k lbf in = 200 / a distance of one inch starting from its free length where 0 F = 0 . Express your answer in both lbf·ft and Btu.

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

1 is a answer of a question