Position
is the starting point you choose to describe the location, or position, of an object.
Reference Point
What's the difference between Velocity & Acceleration
V= speed and the direction of a moving object
A=a measure of the change in velocity during a period of time.
Forces forming a net force of zero?
Balanced forces
What is Energy?
Is the ability to cause a change.
is an object’s distance in a certain direction from a reference point
Position
the rate of change of position in which the same distance is traveled each second
Constant Speed
What is Inertia?
the tendency of an object to resist a change in its motion
The energy an object has because it is in motion
Kinethic Energy
is the process of changing position.
Motion
Byun walked 15 blocks in 25 minutes. What was his average speed?
0.6 blocks per minute
A force that causes objects to lose momentum is
friction
Energy can't be...
Created or destroyed
is the difference between the initial (first) position and the final position of an object.
Displacement
Distance = 3 km / Time = 20 minutes / Velocity? in km/h.
9 km/h.
If V = 10 m/s & momentum of 50 kg·m/s, what is the mass?
5 kg
The Three kinds of Potential Energy
Gravitational, Chemical and Nuclear
Library is 2 blocks east of the park and 3 blocks west of the school, What's the distance from the school to the park?
1 blocks east
V1= 14 m/s. After 30 s, V2= 20 m/s. Acceleration?
0.2 m/s²
A 0.8 kg object is accelerated at 30 m/s². What force was applied?
F=24N
3 kinds of both Kinetic & Potential
Mechanical Energy, Thermal Energy, Geothermal Energy