discussion summary practice problems Forces In Two Dimensions Summary Force is a vector quantity. Forces have direction and don’t you ever forget that. Probably the best way to handle the vector nature of forces is to resolve them into components. Go easy on yourself. Pick the most convenient coordinate system. A system can be in equilibrium or non-equlibrium along an ...

Read More »# dynamics i: force

## Forces In Two Dimensions Discussion

discussion summary practice problems Forces In Two Dimensions Discussion conventional coordinates x, y, z rotated coordinates parallel (∥), perpendicular (⊥), and lateral warped (wrapped) coordinates string & pulley problems

Read More »## Equilibrium problems

discussion summary practice problems Equilibrium problems practice A 100 N sign is to be suspended by two cables. Determine the tension in each cable for the given angles… 090°, 090° 180°, 045° 120°, 030° Three forces act on a point: 3 N at 0°, 4 N at 90°, and 5 N at 217°. What is the net force? What fourth force will put the point in equilibrium? ...

Read More »## Equilibrium Practice

discussion summary practice problems Equilibrium Practice practice problem 1 A 100 N sign is to be suspended by two cables. Determine the tension in each cable for the given angles… 090°, 090° 180°, 045° 120°, 030° solution For all solutions, let T1 be the cable on the left and T2 be the cable on the right. The sign always has weight (W), which points down. The sign isn’t ...

Read More »## Equilibrium Summary

discussion summary practice problems Equilibrium Summary Statics is the branch of mechanics dealing with forces acting on an object at rest. Static Equilibrium (Point Bodies) A point body is in static equilibrium when the net force on it is zero. A point body in static equilibrium will not accelerate. It will remain at rest or continue moving with a constant velocity. 2 ...

Read More »## Equilibrium Discussion

discussion summary practice problems Equilibrium Discussion Physics is an essential part of a nutritious breakfast. Placeholder text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris eu diam consectetur, pellentesque nisl vitae, maximus est. Nulla tempus volutpat lectus non volutpat. Vestibulum vel elementum dui. Pellentesque suscipit urna vitae hendrerit lobortis. Nam id finibus purus. Integer orci nulla, tincidunt vehicula nibh ...

Read More »## Friction Problems

discussion summary practice problems Friction Problems Problems practice A wooden pallet carrying a load of 600 kg rests on a wooden floor. A forklift driver decides to push it without lifting it. What force must be applied to just get the pallet moving? After a bit of time, the pallet begins to slide. How fast is the pallet moving after sliding ...

Read More »## Friction Practice

discussion summary practice problems Friction Practice Practice practice problem 1 A wooden pallet carrying a load of 600 kg rests on a wooden floor. A forklift driver decides to push it without lifting it. What force must be applied to just get the pallet moving? After a bit of time, the pallet begins to slide. How fast is the pallet moving ...

Read More »## Friction Summary

discussion summary practice problems Friction Summary Definition Friction is a catchall word that refers to any force that resists relative tangential motion (or intended motion). “Relative tangential motion” is a fancy way to say “slipping” or “sliding”. Its direction is opposite the relative velocity (or intended velocity). Types Dry friction The resistive force between solid surfaces in contact that resists their ...

Read More »## Friction Discussion

discussion summary practice problems Friction Discussion The force between surfaces in contact that resists their relative tangential motion (slipping). Types: static & kinetic Classical Approximations independent of surface area, speed (except when v = 0), and temperature depends on the nature of the surfaces in contact and is directly proportional to the normal force. Interesting quote… Guillaume Amontons (1663–1705) France It was Guillaume Amontons ...

Read More »