Newton

Question 1

Newtons 1st Law of Motion: Law of Inertia

Answer 1

an object at rest will remain at rest and an object in motion will remain in motion moving in a straight line at a constant speed unless an unbalanced acts on it

Question 2

Newtons 2nd Law of Motion

Answer 2

an object mass acted upon by a force, will accelerate in the direction of the force 

Question 3

Newtons 3rd Law of Motion

Answer 3

 for every action force, there is an equal (and strength) and opposite (in direction) reaction. they don’t cancel each other out because the action force actions on a different object, then the reaction force. If they acted on the same object they’d cancel, but they don’t. Since each individual force is unbalanced, the net force results in movement.

Question 4

sliding friction

Answer 4

 the force the opposes two solid object sliding past each other. This is what makes moving objects, slow down and stop.

Question 5

Rolling friction

Answer 5

when an object roles across a surface. this is much easier to overcome because less of the surfaces come contact with each other

Question 6

Fluid friction

Answer 6

A fluid is a gas or liquid so this type of function occurs when a solid object moves through water or air

Question 7

static friction

Answer 7

Acts between objects that aren’t moving. this is the force that keeps you from intentionally moving an object until you apply enough force to overcome the static friction

Question 8

mass

Answer 8

def: amount of matter in an object
 measured in: grams/kilograms
Constant or changes in universe: constant

Question 9

weight

Answer 9

def: measurement of force of gravity, pulling on object
Measured in: newtons(N)
Constant or changes in universe: changes… more gravity, more weight

Question 10

on earth, gravity causes objects to accelerate at 9.8m/s2 toward earths surface

Question 11

terminal velocity

Answer 11

Occurs when the forces of gravity and air resistant are equal ( when gravity = air resistance, you have terminal velocity)

Question 12

Parachute example

Answer 12

If gravity > air resistance + acceleration
Ex: as soon as a skydiver jumps

If gravity = air resistance constant speed (terminal velocity)
Ex: after free falling for time or the time period after their parachute opens

If gravity < air resistance - acceleration
Ex: parachute is opening