Introductory Physics I PHYS 1P21/1P91 Winter 2020

Instructor: Laila H. Obied

https://physics.info/motion/

Physics

“I have no special talent. I am only passionately curious.” Albert Einstein

The universe functions according to certain rules,

Physics is about learning those rules!

Quark <10-15 m Visible Universe ~1027 m

- Why Physics courses are difficult? It is not.. We need to learn many concepts, link them together to form a

more comprehensive idea. + a lot of math!.

In this course: Aspects of motion: • Kinematics: Mathematical description of motion.

• Dynamics: Force the “cause” of motion, and acceleration the “effect”.

• Work and Energy.

Types of Motion: straight-line motion, Projectile motion, Uniform circular motion, Rotational and oscillatory motion.

Tools: Equations of motion in 1D and 2D, Newton’s laws of motion,

HyperPhysics, R. Nave , Department of Physics and Astronomy, Georgia State University.

Projectile to Satellite! What goes up may not come down!

https://images.app.goo.gl/i2N4U3bN65XAzuSG8

engraved representation of the original sketch by Newton in

Principa, https://www.christies.com/en/lot/lot-5331969 .

Why bicycles are stable at all !!

“Life is like riding a bicycle. To keep your balance you must keep moving.” Albert Einstein

Mathematical tools to consider for this course

• Dealing with numbers: scientific notation and power

of 10, prefixes, significant figures and

approximations.

• Coordinate systems.

• Vectors: components of a vector (A, Ɵ) (Ax,Ay)

• Trigonometry: Right-angle trigonometry

(Pythagorean theorem)

• Solving equations, solving quadratic equation.

Solving problems strategy! • Read the entire problem carefully.

• List the numerical values given in the problem and make

sure to use the variable symbol used in the course, this will

help you recall the appropriate equation easily.

• Units! Check if units are consistent and convert if needed.

• Map out your solution plan by drawing a sketch or a

motion diagram if applicable.

• Make a list of possible formulas ( or mark them in your

formula sheet) this will help you decide which equation to

use to find the unknown variables.