# Forces and Terminal Velocity

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• Created by: LSmith
• Created on: 26-03-14 14:56
What is terminal velocity?
when the resultant force acting on them is zero and they are moving at a steady speed
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Weight is a force exerted on an object because of a _______ force
Gravitational
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Usually, you need to think about two forces:
The weight of the object (downwards force) and air resistance (frictional force in opposite direction)
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1. At the start, the object accelerates downwards because of its weight. There is no air resistance. There is a resultant force acting downwards.
2. As it gains speed, the object's weight stays the same, but the air resistance on it increases. There is a resultant force acting downwards.
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3. Eventually, the object's weight is balanced by the air resistance. There is no resultant force and the object reaches a steady speed, called the terminal velocity
Weight is not the same as mass
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Mass is a measure of what?
How much stuff is in an object
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What is weight?
Weight is a force acting on that stuff
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Weight is the result of __________
Gravity
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The Earth's gravity attracts objects towards the __________ and you feel forces like this as ________
Centre of the Earth Weight
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W = m × g W=?
W = weight (Newtons)
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W = m × g m=?
m = mass (kg)
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W = m × g g=?
g = gravitational field strength (N/kg)
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## Other cards in this set

### Card 2

#### Front

Weight is a force exerted on an object because of a _______ force

Gravitational

### Card 3

#### Front

Usually, you need to think about two forces:

### Card 4

#### Front

1. At the start, the object accelerates downwards because of its weight. There is no air resistance. There is a resultant force acting downwards.

### Card 5

#### Front

3. Eventually, the object's weight is balanced by the air resistance. There is no resultant force and the object reaches a steady speed, called the terminal velocity