# PHYSICS IGCSE Forces

Really good coloured revision notes on Forces. Includes:

• Terminal Velocity
• Hookes Law
• Resultant Forces
• Inertia
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• Created by: Cecily
• Created on: 17-04-12 18:57
Word Document 8.5 Mb

## Pages in this set

### Page 1

Inertia- The tendency for an object to resist
any change in its motion. The bigger an object
is, the more it resists a change in its motion.

NEWTONS LAWS OF MOTION:
An object at rest will remain at rest and an
object win a straight line with a constant
speed…

### Page 2

EG:

As the force increases the acceleration
increases:
Provided the mass of the object is constant.
If the mass of the trolley doubled, acceleration
is halved for the same force.

Free- fall/ skydiver:

When an object is released from a height, its
starting speed is O m/s
As it falls,…

### Page 3

The surface area of the object
The velocity of it
TERMINAL VELOCITY:
Velocity reached when drag is equal to
weight.

### Page 4

The objects own weight causes it to accelerate.
Drag reduces the acceleration gradually as
drag increases.
When the drag is equal and opposite to the
weight, it can no longer accelerate and the
object falls at a constant velocity =
TERMINAL VELOCITY. (through any fluid,
an object will reach terminal…

### Page 5

TOTAL STOPPING DISTANCE= THINKING
DISTANCE +
BRAKING
DISTANCE
THINKING DISTANCE: The faster the car is
going, the further the car will travel in the
same reaction time
Depends on:
Distractions
Drugs/ Alcohol
Tiredness

BRAKING DISTANCE:
The speed of the car
The condition of the brakes