Describing Motion and Force
Definition of a force.
A push or pull
Definition of speed
The distance an object travels in a certain amount of time.
Newton's first law
An object in motion remains in motion unless acted upon by another force.
Weight
Measure of the force of gravity on an object
The net force of two people pulling in opposite directions with a force of 60 newtons.
Zero
Unit for the strength of a force.
Newton
Speed at a particular instant
Instantaneous speed
Mass definition
Amount of mass something has
All matter has a gravitational force (true or false).
True
A car travels 60 miles in one hour
60mph
The net force of a person pulling right with 60 newtons and another person pulling left with 30 newtons.
30 newtons to the right
Definition of velocity
Speed of an object traveling in a given direction.
Inertia
Weight
Measure of the force of gravity on an object.
Free 300
heck yeah
Definition of friction
A contact force two surfaces exert when they rub against each other.
Definition of acceleration
Rate of which velocity changes.
Newton's second law
States that mass directly affects how much force is required to accelerate the object.
Two factors of the force of gravity
Distance and mass
A soccer ball is at rest and is kicked at 24m/s over a span of three seconds.
8m/s^2
Definition of gravity
A force that pulls objects together based on their masses.
A car remains at rest and speeds up to 60/mph in a span of 12 seconds. What is the acceleration?
5m/s^2
Newton's Third law
If one object exerts a force on an object, it pushes back with an equal force in the opposite direction (action-reaction).
Why does the moon have less gravitational force compared to Earth?
It has much more less mass than Earth.
A ten-pound bowling ball is dropping down 9.8m/s^2 at a height of 60 feet.
5880 Joules