rate an object's positon changes over time at any momment
speed
rate of speed and direction of a moving object
velocity
measurement of the force of gravity between an object and earth
weight
a book resting on a table demonstrates ________ _______ because the structural strength of the table balances the gravitational force.
balanced forces
rate of change in an object's velocity over time
acceleration
the measurable or observable push or pull action on an object
force
objects either remain at rest or in motion unless acted on by an external force
inertia
the force that opposes motion
friction
operation that produces work
action
Objects stay at rest or stay in motion unless a force causes objects to move or to stop moving
Examples: A book sits on a table. A car cannot drive through a wall.
Newton's 1^{st} Law of Motion
The greater the mass of an object the more force that is needed to move the object. Example: Kicking a ball. Kicking a wall.
Newton's 2nd Law of Motion
Every force creates an equal but opposite force. Example: A ball bounces. A rocket fires.
Newton's 3rd Law of Motion
Every object is attracted to every other object. The greater the resultant mass of two objects the greater the attraction; while the greater the separation of the objects, the lesser the attraction. Example: A person on the Earth. A person on the Moon.
Newton's Law of Gravitation
increasing velocity over time
acceleration
decreasing velocity over time
deceleration
Motion Law 2 states the greater the mass of an object the more force that is needed to move it. What formula is used to describe this?
Use "a", "F" for force and "m" mass.
What is "a"?
a = F/m (acceleration)
For Caleb's punishment, he must push a cart of Russet potatoes, with a mass of 10 kg. The potato cart rolls when Caleb presses with 20 N force. What is the acceleration of the rolling cart of Russets?
using a(cceleration) = F(orce)/ m(ass); a(cceleration) = 20 Newton/ 10 kilos or an acceleration rate of: 2 meters per second, per second
Speed and velocity both measure distance and time. What additional measurement does velocity track that speed does not?
direction
What are the ways in which an object can change acceleration?
There can be a change in mass. (A rocket ship jettisons its boosters.)
There can be a change in force. (The secondary rocket engines are engaged.)
Newton's 3^{rd} Law of Motion
Every force creates an equal but opposite force. Example: A ball bounces. A rocket fires.
Newton's 2^{nd} Law of Motion
The greater the mass of an object the more force that is needed to move the object. Example: Kicking a ball. Kicking a wall.
Newton's 1^{st} Law of Motion
Objects stay at rest or stay in motion unless a force causes objects to move or to stop moving Examples: A book sits on a table. A car cannot drive through a wall.