HCI 03 Dynamics Lecture Notes

Hwa Chong Institution (College) H2 Physics C1 2023 1 Chapter 3 Dynamics “Although you can get a strike by hitting the head pin square-on, it is not a very high percentage shot. Hitting the pins in "the pocket", which is the gap between the head pin and the next pin on the right (the 3-pin) for right handed bowlers, and the next pin to the left (the 2-pin) for lefties, will strike with the most consistency.” (Neil Lazarski, “How to Raise Your Bowling Average”)

Hwa Chong Institution (College) H2 Physics C1 2023 2 H2 Physics Syllabus 9749 Topic 3: Dynamics Content  Newton’s laws of motion  Linear momentum and its conservation Learning Outcomes Students should be able to: (a) state and apply each of Newton’s laws of motion. (b) show an understanding that mass is the property of a body w hich resists change in motion (inertia). (c) describe and use the concept of weight as the force experie nced by a mass in a gravitational field. (d) define and use linear momentum as the product of mass and v elocity. (e) define and use impulse as the product of force and time of impact. (f) relate resultant force to the rate of change of momentum. (g) recall and solve problems using the relationship F = ma, appreciating that resultant force and acceleration are always in the same direction. (h) state the principle of conservation of momentum. (i) apply the principle of conservation of momentum to solve si mple problems including inelastic and (perfectly) elastic interactions between two bodies in one dimension. (Knowledge of the concept of coefficient of restitution is not required.) (j) show an understanding that, for a (perfectly) elastic colli sion between two bodies, the relative speed of approach is equal to the relative speed of separation. (k) show an understanding that, whilst the momentum of a closed system is always conserved in interactions between bodies, some change in kinetic energy usually takes place. Topic 4: Forces (Part) Learning Outcomes Students should be able to: (b) describe the forces on a mass, charge and current-carrying conductor in gravitational, electric and magnetic fields, as appropriate. (c) show a qualitative understanding of normal contact forces, frictional forces and viscous forces including air resistance. (No treatment of the coefficients of friction and viscosity is required.) (d) show an understanding that the weight of a body may be take n as acting at a single point known as its centre of gravity.

Hwa Chong Institution (College) H2 Physics C1 2023 3 Contents 3.1  Introduction ....................................................................................................................................... 4  3.1.1  Types of Forces ........................................................................................................................... 4  3.1.2  Weight ...........................................