# What Are The Effects Of Force?

Forces cause acceleration or deceleration. A stationary object will remain stationary if the sum of the forces acting upon it (the resultant force) is zero. If an object is already moving and has a resultant force of zero, then it will continue to move at the same speed it was already travelling at.

If the resultant force is not zero, then the object will accelerate in the direction of the force that has been applied. This means that if the force is in the direction that the object is already travelling, it will accelerate, but if it is in the other direction then it will decelerate.

Resultant force

An object may have several different forces acting on it with different strengths and directions. They can be added together to provide the resultant force. The resultant force that has the same effect on the object as all of the individual forces together.
When all the forces are balanced, there is no resultant force. If there is an imbalance then there is a resultant force.

An object accelerates in the direction of the resultant force. The bigger the force is, the greater the acceleration will be. Doubling the mass of the resultant force would double the acceleration.

The equation that shows the relationship between resultant force, mass and acceleration is:

Resultant force (Newton, N) = mass (kg) _ acceleration (m/s2)
This equation would demonstrate that 1 newton is required to give 1 kg an acceleration of 1m/s2.
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Accelerate
deccelerate
change direction
deform
break
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It can make objects move or come down to rest
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-change the shape of the object
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How comprehensive an answer do you want? The simple response is that forces cause acceleration. But they are also responsible for friction;repulsion;attraction(and hence solid bodies maintaining their shape).

They are worked with (reduced) in aerodynamics,and lubrication. They are enhanced in braking systems. They are converted into electricity (piezo electrical systems). They are used to make aircraft fly (lift and thrust).

In natural systems they cause tides and earthquakes and keep us orbiting around the sun at a fixed distance. On a very large scale they are causing the expansion of the universe...
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