G481 Mod 1 and 2 Definitions Flashcards Preview

OCR Physics A Level > G481 Mod 1 and 2 Definitions > Flashcards

Flashcards in G481 Mod 1 and 2 Definitions Deck (20):
1

Acceleration

The rate of change of an objects velocity

2

Average Speed

The total distance traveled by an object divided by the total time

3

Braking Distance

The distance traveled by a vehicle from the moment the brakes are applied until the vehicle comes to a stop

4

Centre of Gravity

The point where the entire weight of an object appears to act

5

Components of a vector

The magnitudes of a vector quantity in two perpendicular directions

6

Density

The mass per unit volume

7

Equilibrium

An object in equilibrium is at rest or travelling at a constant velocity because the net force and moment is zero

8

Instantaneous Speed

The speed of an object measured over a very short time

9

Mass

A measure of the amount of matter within an object

10

Newton

The force that will give a 1kg mass an acceleration of 1ms-2 in the direction of the force

11

Pressure

The force acting normally per unit area of a surface

12

Scalar

A quantity that has magnitude but no direction

13

Speed

The rate of change of distance of an object

14

Stopping Distance

The sum of the braking and thinking distance

15

Terminal Velocity

The constant velocity of an object travelling through a fluid. The net force on the object is zero

16

Thinking distance

The distance traveled by a vehicle in a time equal to the reaction time of the driver

17

Uniform Acceleration

Acceleration that is constant

18

Vector

A quantity that has both magnitude and direction

19

Velocity

The rate of change of displacement

20

Weight

The force on an object caused by a gravitational field acting on a mass