PSYC 301 Lecture Notes - Lecture 10: Gravitational Constant, Friction, Inertial Frame Of Reference
Document Summary
Inertial frames of reference: an inertial reference frame is one in which newton"s law of inertia is valid. Newton"s second law of motion: moving from vi= 0 to v with acceleration a, si unit of f: (cid:1813)/(cid:1819)=(cid:1820)(cid:1815)(cid:1814) (cid:4666)(cid:4667) If f=0 th locty a th a (cid:2183)=(cid:2196)(cid:2187)(cid:2202) (cid:2188)(cid:2197)(cid:2200)(cid:2185)(cid:2187) (cid:2183)(cid:2185)(cid:2202)(cid:2191)(cid:2196)(cid:2189) (cid:2197)(cid:2196) (cid:2197)(cid:2184)(cid:2192)(cid:2187)(cid:2185)(cid:2202) (cid:2195)(cid:2183)(cid:2201)(cid:2201) (cid:2197)(cid:2188) (cid:2197)(cid:2184)(cid:2192)(cid:2187)(cid:2185)(cid:2202) Computing the net force: free-body diagram: object + forces that act on the object. Vector nature of the 2nd law: the direction of force and acceleration vectors can be taken into account by using x and y components. Example: a man is stranded on a raft (mass of man and raft = 1300 kg). By paddling, he causes a force of 17 n on the raft due east. The wind also exerts a force on the raft with a magnitude of 15 n and 67 o north of east. Find x and y components of the acceleration.
