PHYS 101

Intro to Physical Science

1 mile = __________ meters

1609 meters

1 inch = ____________ cm

2.54 centimeters

1 mile = ___________ feet

5280 feet

Scientific notation is

shorthand way to write a very large or very small number by expressing them as a number between 1 and 10 multiplied by a power of 10.

Newton’s first law

An object at rest or in uniform linear motion remains so unless acted on by a force

If your total net force is 0, then your

motion isn’t changing

if you’re at rest

you’re not moving at all

Constant velocity

no speeding up, slowing down, or changing direction

Normal force

the push-back force from a surface that keeps things from falling through it.

The 2 types of linear motion

constant and accelerated

You use constant motion when

there is no acceleration (traveling horizontally with no wind resistance)

You use accelerated motion when

there is an acceleration ( like when looking at vertical motion)

Constant motion

x=vt

accelerated motion

x=1/2 v t²

newton’s second law

an object’s acceleration depends on the net force acting on it and its mass

Acceleration =

net force/ mass

To find net force, you

add all the forces together. Your negative forces will be friction or wind.

If the wind is pushing up on you with 400N of forces, then

that 400N will be negative in the total net force

Newton’s third law

For every action there is an equal opposite reaction

all forces come

in pairs and are equal

accelerations are not

necessarily equal

00000000000000074

7.4 × 10^-16

21,000,000,000,000

2.1 × 10^13

000000000000000068

6.8 × 10^-17

Scientific term that describes to us how nature behaves?

law

Scientific term that describes to us why nature behaves the way it does

theory

two measurements necessary for calculating acceleration

change in velocity and time

if an object has a constant velocity, the position of the object must

continually change by the same amount each second

Mr. Scheller throws his sister horizontally off the Science center on a day with no air resistance. Her horizontal speed remains the same because

she is not acted on by any horizontal forces

A minivan is traveling east at 60 miles per hour when Abby sitting in the minivan tosses a ball straight upwards. Upon falling back down, the ball

lands in her lap in the car seat

If I push on you with a force of 50N, you accelerate. If I push on you with 100N of force your acceleration will

increase by a factor of 2

I push on a box sitting on the floor and friction opposes my push with a force of 10N. How hard must I push to keep the box moving at a constant speed of 20 m/s?

10N

When a skydiver jumps out of a plane, the earth pulls her downward with a force equal to her weight. What is the reaction force?

the skydiver pulling the earth upward

The force that enables your car to move forward is provided by

the road