Қозғалыс, жылдамдық және үдеу бойынша ашық сабақ, 7 сынып

Welcome to Physics Welcome to Physics

Main Principal #1: Physics is

the study of moving objects!

We want to be able to predict how object

will move in all situations

But here’s the problem:

Q: How do you know if an object is actually “moving”?

A: When it’s “changing position”

(travelling a certain distance)? If a person is “standing still”, we assume he/she is “not moving”

But what about the planet that person is

standing on?

Is the person therefore “moving” anyway?

So how do we tell if something really is “moving”?

It is moving around a star!!!

Oh boy; welcome to physics!!!

We use a principal called: “Point of

Reference”

The hands on a clock don’t seem

to move; but they are constantly

moving very slowly!

e passengers in a boat moving compared to a person standing on the s

he person standing on the shore moving compared to the boat in the w

Fwew! It can be tricky!

“PoR” means: what appears to be moving to you?

t can be tricky to really know what is moving and what isn’t!

Main Principal #2 & 3:

• #2: Basically, (if you really think about #2: Basically, (if you really think about

it) it) all objects all objects are are moving moving some amount, some amount, all the time all the time.

• #3: We #3: We compare compare the motion of the object the motion of the object that that appears to move appears to move to a “ to a “stationary stationary” ” object (one that doesn’t appear to object (one that doesn’t appear to

move). move).

An object is moving “slowly” if it moves a short distance in a long time. object is moving “quickly” if it moves a long distance in a short time.

There are several ways we use to describe the motion of an obj