Section 1 Flashcards
——– occurs when an object changes its position relative to a reference point
Motion occurs when an object changes its position relative to a reference point
An important part of describing the motion of an object is describing how ——- it has moved
An important part of describing the motion of an object is describing how far it has moved
This is called ——
This is called distance
The S I unit for distance is the——
the SI unit for distance is the meter
—– is the —— and —— of an objects change in position from the starting point
Displacement is the distance and direction of an objects change in position from the starting point
You can describe the movement by the —— traveled and by the —— from the starting point
You can describe movement by the distance traveled and by the displacement from the starting point
Speed is the —— an object travels per unit of ——-
Speed is the distance and object travels per unit of time
Calculating speed
the S I unit for distance is the —— and the S I unit for time is the —— so the SI units of speed are measured in ——
The S I unit for distance is the meter (m) and the S I unit for time is the second (s) so the SI units of speed are measured in meters per second (m/s)
Sometimes it is more convenient to express speed in other units, such as —— or in America ——
Sometimes it is more convenient to express speed in other units such as KM/HR or in America MPH
Changing speed
usually speed is ———constant
Usually speed is not constant
Average speed
average speed describes speed of —– when speed is ——
Average speed describe speed of motion when speed is changing
Instantaneous speed a speedometer shows how fast a car is going at —— —— —– —— or at one ——-
Instantaneous speed
a speedometer shows how fast a car is going at one point in time or at one instant
Graphing motion the motion of an object over a period of time can be shown on a —— graph
The motion of an object over a period of time can be shown on a distance-time graph
Velocity is defined as —— ——- ——
Velocity is defined as speed with direction
A moving object has a property called ——- that is related to how much ——- is needed to ——– its motion
A moving object has a property called momentum that is related to how much force is needed to change its motion
The momentum of an object is the products of its mass and velocity momentum is given the symbol —–
The momentum of an object is the products of its mass and velocity momentum is given the symbol p
When two objects had the same —— velocity the object with the ——–mass has the —- momentum
When two objects have the same velocity of the object with the larger mass has the larger momentum
A —— ——- is needed to determine the position of an object
A reference point is needed to determine the position of an object
