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Forces and Free-body diagrams

Forces and Free-body diagrams. By Corina Bot. A force is a vector quantity (=> has both magnitude and direction). To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction.

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Forces and Free-body diagrams

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  1. Forces and Free-body diagrams By CorinaBot

  2. A force is a vector quantity (=> has both magnitude and direction). To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction. It is common to represent forces using diagrams in which a force is represented by an arrow. The size of the arrow is reflective of the magnitude of the force and the direction of the arrow reveals the direction which the force is acting. (Such diagrams are known as free-body diagrams) http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/newtlaws/u2l2a.html

  3. Normal Force Tension Force Gravitational Force If we push the block harder and harder, the frictional force will increase, until it reaches a maximum (in this case, 2.5N). If we push harder still, (say, 2.6N), the block will start to move, because we're now pushing harder than the frictional force. Spring Force Frictional Force http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/newtlaws/u2l2a.html http://home.clara.net/darvill/enforcemot/friction.htm http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Dynamics/Forces/Tension.html http://en.wikipedia.org/wiki/Force

  4. Gravitational Force Iron filings and compasses show the shape and direction of the magnetic field An initially stationary object - allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. Electric vector field surrounding two opposite point charges. Red is positive, green is negative. http://en.wikipedia.org/wiki/Force http://en.wikipedia.org/wiki/File:EfieldTwoOppositePointCharges.svg http://www.school-for-champions.com/science/magnetic_detection.htm

  5. A mini-car is pulling a block, with a force of 190N, as shown in figure. The block has a mass of 15 kg and the coefficient of kinetic friction between the bottom of the block and the surface is 0.6. Find the acceleration of the cart. By definition: 15 kg y 0 x

  6. y From equation (1): From equation (3): 0 x From equation (2):

  7. A descendant of the original apple tree can be seen growing outside the main gate of Trinity College, Cambridge, UK, below the room Newton lived in when he studied there.

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