CAS PY 105 Lecture 3: Acceleration

• School: Boston University
• Department: Physics
• Course: CAS PY 105
• Professor: Andrew Duffy

Document Summary

Newton"s 3rd law: equal and opposite forces, all objects exert the same force on each other. Regardless of speed or mass, objects exert equal and opposite forces on each other. An object pulling harder on another object does not equal a greater force! Same goes for an object pushing on another object at various rates, the forces will be the same. Has a large acceleration because force is being divided by a small mass. Has a negligible acceleration because the force (same force as in the acceleration of mosquito) is being divided by a large mass. Displacement is area under the curve for the time interval on the velocity-vs-time graph. If the velocity is constant, the area under the curve is a rectangle (easier to measure) Acceleration: a vector that represents how fast and in which direction something"s velocity is changing. As time approaches 0, average acceleration becomes instantaneous.