P1 Motion Flashcards Preview

Physics > P1 Motion > Flashcards

Flashcards in P1 Motion Deck (18):
1

Weight is

The amount of gravitational force an object is experiencing, is a VECTOR, is a force so measured in N

2

Mass is

How much of something there is, is a SCALAR, measured in Kg

3

Scalar

A physical quantity with only magnitude, e.g. speed, distance, mass, energy etc.

4

Vector

A physical quantity with magnitude and a direction, e.g. force, velocity, displacement, weight, acceleration

5

Difference between distance and displacement

Distance is a scalar, how far something has moved
Displacement in a vector, how far something has moved in a specific direction

6

Difference between speed and velocity

Speed is a scalar, how fast something is moving
Velocity is a vector, how fast something is moving in a specific direction

7

Acceleration is

The change in speed/velocity of an object over time(- acceleration is deceleration)

8

Acceleration, velocity, time formula

Acceleration = change in velocity/ time
a=v-u/t
Change in velocity is final velocity-starting velocity(v-u)

9

Distance, speed equation

Speed=distance/time

10

How can speed be measured in a school

Time an object move 1 meter, do 1 / time in seconds

11

Typical speeds for walking, running, cycling, car

Walking 1.4 m/s
Running 4 m/s
Cycling 6m/s
Car on motorway 31m/s
Car on typical town speed limit 10.5 m/s

12

Distance/time graphs

Flat = stationary
Steep = fats
Shallow = slow
Curving = acceleration

13

How to determine average speed from a distance/time graph

Take an amount of time, e.g. 10 seconds, then find the change in distance over the 10 seconds to calculate speed with s=d/t

14

Acceleration, velocity, distance formula

v^2-u^2= 2*a*x

15

Velocity/time graphs

Going up = speeding up, going down = slowing down, flat = constant speed
Steep = large acceleration, shallow = slow acceleration
+velocity = going away
-velocity = coming towards

16

Force definition

Something which changes the motion of an object

17

Energy definition

The capacity for doing work

18

Momentum definition

Consists of an objects mass and velocity, relates to how force would be required to stop it