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Grade 10 Physical Sciences > 10PS > Flashcards

Flashcards in 10PS Deck (18)
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1

vector

A quantity with both magnitude and direction.

2

scalar

A quantity with magnitude only (no direction).

3

reference point

The point relative to which all measurements are taken.

4

reference frame

A coordinate system with an origin and directions used when taking measurements.

5

distance

The total path length travelled. Scalar.

6

displacement

The change in position of an object. A vector pointing from initial position to final position.

7

speed

The rate of change of distance with respect to time. A scalar.

8

velocity

The rate of change of displacement with respect to time. A vector.

9

position

The location of an object using a particular frame of reference. A vector.

10

instantaneous speed

The speed of an object at a particular moment in time. A scalar equal to the magnitude of instantaneous velocity.

11

instantaneous velocity

The velocity of an object at a particular moment in time. A vector.

12

uniform velocity

Velocity is constant and thus not changing. Both magnitude and direction if velocity must not be changing. Acceleration is zero.

13

acceleration

The rate of change of velocity with respect to time. A vector.

14

positive acceleration

An object is moving in the positive direction and speeding up OR moving in the negative direction and slowing down.

15

negative acceleration

An object is moving in the positive direction and slowing down OR moving in the negative direction and speeding up.

16

deceleration

A word used in everyday language to mean slowing down. Not the same as negative acceleration!

17

speeding up

The acceleration and velocity vectors are pointing in the same direction. Either they are both positive or they are both negative.

18

slowing down

The acceleration and velocity vectors are pointing in opposite directions. One is positive and the other is negative.