PHYA10H3 Chapter Notes - Chapter 5: Mass, Kinematics, Exhaust Gas

• School: UTSC
• Department: Physics and Astrophysics
• Course: PHYA10H3
• Professor: Brian Wilson

Document Summary

Force exerted on an object is in direction perpendicular to the surface that it presses against. Refer li(cid:374)e that"s perpe(cid:374)di(cid:272)ular as (cid:271)ei(cid:374)g normal to the surfa(cid:272)e. Normal force - for(cid:272)e e(cid:454)erted (cid:271)(cid:455) a surfa(cid:272)e/age(cid:374)t agai(cid:374)st a(cid:374) o(cid:271)je(cid:272)t that"s pressi(cid:374)g against the surface: symbol: , a spring force. Respo(cid:374)si(cid:271)le for (cid:862)solid(cid:374)ess(cid:863) of solids, (cid:449)hat"s pre(cid:448)e(cid:374)ti(cid:374)g u fro(cid:373) passi(cid:374)g through the (cid:272)hair. What causes pain when bang head into door. 2 kinds of frictions: kinetic friction - when objects slide across a surface. K points in opposite direction as . Ex. k oppose motion of child on snow sleigh. Frog on inclined plane: s acts in direction that prevents slipping: static friction for(cid:272)e that keeps a(cid:374) o(cid:271)je(cid:272)t (cid:862)stu(cid:272)k(cid:863) o(cid:374) surfa(cid:272)e & pre(cid:448)e(cid:374)t its (cid:373)otio(cid:374) Points in opp direction in which the object would move if there were no friction. Resistive force force that oppose/resist motion. Also points in opp directon of motion. Becomes significant for objects moving at high speeds/in dense fluids.