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For the purposes of this answer, we will assume that the object is a mass that is free to move. We will also ignore friction.

Exerting a force on an object will cause the object to accelerate in the direction of the force. Note that acceleration is any change in velocity so it can result in something moving slower as well as faster. So, applying a force will result in a change in velocity.

The change in velocity is calculated using the equation Force = Mass x Acceleration. The equation shows us that as the force becomes greater, the acceleration will also be greater (assuming the mass is the same). The acceleration will be present for the whole time the force is being applied.

A word about velocity: Velocity is almost interchangeable with speed but there is one important difference. Velocity implies a direction as well as a speed. For example, a car turning a corner may retain the same speed as it turns but the velocity changes because the direction of travel also changes. In many cases, this distinction can be totally ignored but in the physics lab and in exam questions, it is vital that the distinction is understood.

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