Force
What is force?
strength or energy as an attribute of physical action or movement
What is motion?
the action or process of moving or being moved
What is velocity?
the speed of something in a given direction
What is acceleration?
a vehicle's capacity to gain speed within a short time.
What is direction?
a course along which someone or something moves.
equal forces acting on one object in opposite directions
Balanced force
An object at rest stays at rest and an object in motionstays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's First Law of Motion
Speed equals speed divided by time
How is acceleration calculated?
By dividing the change in speed by the change in time
What is a vector?
A vector contains two types of information: a magnitude and a direction. The magnitude is the length of the vector while the direction tells us which way the vector points.
two or more forces that are not equal and opposite of one another; can cause change in motion (start moving or change direction)
Unbalanced force
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Newton's 2nd Law of Motion
What are the units for velocity?
Meters per second
What is the equation for acceleration?
a = Δv ÷ Δt
What is direction used for?
sum of all forces acting on an object
For every action, there is an equal and opposite reaction.
Newton's Third Law of Motion
A car travels at 20 mph for 3 hours. What was the distance traveled?
60 miles
In the equation 'a = Δv ÷ Δt', what does 'Δv' represent?
change in speed/velocity
What is one object used for finding direction?
Compass, magnet, GPS, bond chronometer, bygrave position-line slide rule, ramsden sextant, apollo sextant and scanning telescope, dutch pendulum clock, longines sidereal second-setting watch, lockheed vega 5C winnie mae, etc
A force that causes an object to move in a circle
Centripetal force
Law of Inertia
If it is 200 miles to Neyland Stadium and you travel at 50 mph, how much time will it take you to get there?
4 hours
In the equation 'a = Δv ÷ Δt', what does 'Δ' represent?
Δ is the Greek letter 'delta' which means 'change in'
What is a device that makes work easier by changing the size or direction of force?
Machine