Page 22 - Science E-Book Prep.3 2024-2025 1st term unit1_Neat

Science Department
Prep.3

P.O.C Velocity Speed
Rate of change of distance
Definition: Rate of change of Or Distance covered in
displacement one second

Or Displacement Scalar quantity
covered inone second m/sec or km/h

Its type: Vector quantity A???????????? ??????????
??. ????????????????
Measuring m/sec or km/h =
unit: ?????????? ????????

Its average: A???????????? ????????????????
????????????????????????
=
?????????? ????????

Technological application:

Calculation the amount of fuel necessary for plane to complete thetrip.
Direction of the wind affects the of fuel consumed by the plane.

When plane flies against the When plane flies within wind
wind direction direction

Wind resistance increases and Wind resistance decrease and so
so plane will consume larger plane will consume less amountof
amount of fuel fuel

First Term 21