MOVEMENT

MOVEMENT

In this slide I will cover physics describing

motion.

Motion

Forces

Energy

MOVEMENT

Motion is ‘’the act, process, or result of

moving’’~ dictonary.com.

Movement is when something is in motion. For

example this ball.

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The ball is moving across, what ever it is on, such as a floor, the grass, or in the air. When the ball starts going faster, this is what’s called acceleration.

Acceleration is the time rate of change of an objects velocity.

Acceleration Is ONLY the time rate of change, nothing else. Be sure not to get it confused with velocity.

MOVEMENT

Velocity is the speed and direction traveled.

This can change in three ways:

Object Speeds Up

Object Slows Down

Object Changes Direction

Speed is how fast your object moves.

Velocity is how fast and what in direction.

MOVEMENT

We use velocity and speed a lot when we are in the car. The car will do all of three things; it will speed up, it will slow down, and it will also change direction. Your speed is telling you how fast your car is going.

When the driver presses on

gas pedal the car will

accelerate, or move up in

speed.

MOVEMENT

Speed is the distance travelled divided by

time traveled.

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For example let’s say you were driving from

Chesapeake Virginia to a place that was 78 miles

away. You know it took you 1.2 hours to get there,

and you would like to know how many miles per

hour you traveled at. You divide 78 into 1.2 to get

65 miles per hour.

MOVEMENT

In the next couple of slides we will learn the

definition of the following terms:

Reference point

Vector quantity

Scalar quantity

Acceleration

Free fall

MOVEMENT

1Reference point: A point

against which position is

measured.

4+3 One sunny summer day

you go out side and set a toy

on a picnic table. You walk a

couple feet away and turn

around. The toy hasn’t moved,

from your view. But an

astronaut on the moon says

that it looks like it is moving.

That’s because the earth

moves in a circle motion. The

astronaut was standing on a

moon with no motion. You and

the toy were moving from his

point of view.

MOVEMENT

1Vector quantity: a

physical measurement

that contains directional

information

Vector quantity is a

physical measurement

used to measure speed

and velocity. Like our car

in the example above

we measured how many

hours by how many

miles. Then we got our

answer in speed.

MOVEMENT

1Scalar

quantity: a

physical

measurement

that does not

contain

directional

information

MOVEMENT

1Acceleration: the

time rate of

change of an

objects velocity.

Acceleration=

finial velocity

subtracted by

initial velocity

divided by time.

1Free fall: the motion of an

object when it is falling

solely under the influence

of gravity.

If you drop an item this is

called a free fall.

A local amusement park (

Busch Gardens) has a new

ride called mach tower.

Mach tower is a free fall

ride. The round circle seats

that go around the ride fall

with no impact from the top

(245 feet up) of the ride to

the bottom.

MOVEMENT QUIZ

5What is the speed of a boat that travels 10

miles in 30 minutes? 3 miles per hour

9If an object travels for 15 minutes with a

constant velocity of 12 miles per hour west,

what is the acceleration? .8