# Forces

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• Created by: Sam Evans
• Created on: 04-01-15 18:00
If you push on a wall with a horizontal force of 15N to the right, what force will the wall exert on you?
15N to the left
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What happens to an object moving at a steady speed if the resaltant force on it is zero?
The object continues to move at a steady speed in the same direction
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When will a resultant force cause a deceleration?
When the force is in the opposite direction to the motion
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What happens to the acceleration of an object as the resultant force on it increases?
The acceleration increases
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What is the resultant force on a car of mass 1500kg if its acceleration is 0.5 m/s squared?
750 N
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What is the acceleration of a car of mass 2000kg if the resultant force acting in its direction of motion is 800N?
0.4 m/s squared
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What is the effect of the speed of a vehicle on its stopping distance?
the faster the speed the greater the stopping distance
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What is terminal velocity?
the final steady speed of an object falling freely through a fluid
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What is the weight of a person of mass 70kg?
700N
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What is an elastic object?
one that goes back to its original shape and size when the force applied to it is removed
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What does Hooke's law state?
the extension is directly proportional to the force applied, provided the limit of proportionality is not exceeded
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When a force of 10N is applied to a spring it extends by 2.0cm. What is the spring constant of the spring?
500 N/m
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## Other cards in this set

### Card 2

#### Front

What happens to an object moving at a steady speed if the resaltant force on it is zero?

#### Back

The object continues to move at a steady speed in the same direction

### Card 3

#### Front

When will a resultant force cause a deceleration?

### Card 4

#### Front

What happens to the acceleration of an object as the resultant force on it increases?

### Card 5

#### Front

What is the resultant force on a car of mass 1500kg if its acceleration is 0.5 m/s squared?