Parallel Forces

• Composition of parallel forces

In physics, a force is a push or pull that can cause an object with mass to accelerate. Force has both magnitude and direction, making it a vector quantity. According to Newton's Second Law, an object will accelerate in proportion to the net force acting upon it and in inverse proportion to the object's mass. An equivalent formulation is that the net force on an object is equal to the rate of change of momentum it experiences. Forces acting on three-dimensional objects may also cause them to rotate or deform, or result in a change in pressure. The tendency of a force to cause rotation about an axis is termed torque. Deformation and pressure are the result of stress forces within an object.

Since antiquity, scientists have used the concept of force in the study of stationary and moving objects. These studies culminated with the descriptions made by the third century BC philosopher Archimedes of how simple machines functioned. The rules Archimedes determined for how forces interact in simple machines are still a part of modern physics. Earlier descriptions of forces by Aristotle incorporated fundamental misunderstandings, which would not be resolved until the seventeenth century when Isaac Newton correctly described how forces behaved. Newtonian descriptions of forces remained unchanged for nearly three hundred years.

• Lever, Holed Rod,With Pair of threaded cylinders (Weight: approx. 18 g each) — 4114.13
• Bosshead in PVC — 5401.22
• Cylindrical Masses with hook (50, 25, 10 g) — 4111.08-10-12
• Pulleys with hook — 4112.10
• “S”hook, length 30 mm — 4113.35
• Rod with hook, diam. 10mm, length 127 mm — 4113.53
• Polyester Inelastic string, diam. 0.8 mm, length 10 m — 4113.20
• Rod with threaded stem M3, diameter 8mm, length 70 mm — 4861.10-021

• What’s the reason behind the equilibrium of our rod? According to which principle do we get it?