Physics Science 20
average speed- description of motion when speed is changing the total
distance over the total time
instantaneous speed- the speed in an instant - correct answer ✔average
speed
instantaneous speed
scalar- only magnitude
vector- magnitude + direction - correct answer ✔scalar
vector
distance- is measured along a path without regard to direction
displacement- the measure from the starting point to the end point
average velocity- the total displacement over the total time (with direction)
indicated how fast an object changes position, and the direction of this change
- correct answer ✔distance
displacement
average velocity
the slope of a line of a position-time graph gives the speed of the object
the area under a line of a velocity time graph gives the displacement of an
object - correct answer ✔slope
, the area under a line of a velocity time graph
acceleration- a change in velocity. (can mean a change in speed or direction
deceleration- a negative change in speed (slowing down)
uniform motion- acceleration described by a sloping, straight line on a
velocity-time graph - correct answer ✔acceleration
deceleration
uniform motion
The oncoming drivers visibility is reduced because of the glare in their eyes
which can lead to accidents.
They also emit more blue light than other headlights, so it takes a long time to
adapt back to seeing in the dark - correct answer ✔Describe two risks
associated with the use of HID headlights.
They illuminate more distance ahead of the vehicle, so the driver can see
farther, so the driver would notice something on the road earlier.
They improve visibility in the rain. - correct answer ✔Describe two benefits
associated with the use of HID headlights.
For travel where there is a change in direction or where the movement is not
in a straight line, the magnitude of the average velocity will be less than the
average speed. - correct answer ✔For many journeys, the magnitude of the
average velocity is less than the average speed. Describe a situation where
this relationship is true.
If they only went to intersections where the speed limit was 70km/h or less
they would not get a whole representation of different speed limits and how
average speed- description of motion when speed is changing the total
distance over the total time
instantaneous speed- the speed in an instant - correct answer ✔average
speed
instantaneous speed
scalar- only magnitude
vector- magnitude + direction - correct answer ✔scalar
vector
distance- is measured along a path without regard to direction
displacement- the measure from the starting point to the end point
average velocity- the total displacement over the total time (with direction)
indicated how fast an object changes position, and the direction of this change
- correct answer ✔distance
displacement
average velocity
the slope of a line of a position-time graph gives the speed of the object
the area under a line of a velocity time graph gives the displacement of an
object - correct answer ✔slope
, the area under a line of a velocity time graph
acceleration- a change in velocity. (can mean a change in speed or direction
deceleration- a negative change in speed (slowing down)
uniform motion- acceleration described by a sloping, straight line on a
velocity-time graph - correct answer ✔acceleration
deceleration
uniform motion
The oncoming drivers visibility is reduced because of the glare in their eyes
which can lead to accidents.
They also emit more blue light than other headlights, so it takes a long time to
adapt back to seeing in the dark - correct answer ✔Describe two risks
associated with the use of HID headlights.
They illuminate more distance ahead of the vehicle, so the driver can see
farther, so the driver would notice something on the road earlier.
They improve visibility in the rain. - correct answer ✔Describe two benefits
associated with the use of HID headlights.
For travel where there is a change in direction or where the movement is not
in a straight line, the magnitude of the average velocity will be less than the
average speed. - correct answer ✔For many journeys, the magnitude of the
average velocity is less than the average speed. Describe a situation where
this relationship is true.
If they only went to intersections where the speed limit was 70km/h or less
they would not get a whole representation of different speed limits and how
