OCR Gateway P3g

Question	Answer
P3g - Falling Safely	.
Falling Objects	All objects fall with the same acceleration due to gravity, as long as the effect of air resistance is very small.
The size of air resistance	The size of air resistance force on a falling object depends on: -it's cross sectional area - the larger the area the greater the air resistance. -its speed, the faster it falls the greater the air resistance.
Terminal Speed	When objects fall through the Earth's atmosphere they get faster and faster until they reach a terminal speed. This is when the upwards force (air resistance) and downwards force (weight) equal each other. At this point the object travels at its fastest speed.
Factors that affect falling	The factors affecting the terminal speed of a falling object include: - its mass - its surface area - the acceleration due to gravity, g.
On the Moon	There is no drag on falling objects when there is no atmosphere. This means that the acceleration of falling objects due to gravity is the same whatever their mass and shape.

Resource summary

	Created by Zaaaara almost 10 years ago