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  • Effect of Force on Velocity: Straight-Line Motion Explained
    Here's how the velocity of an object changes when a net force acts in the same direction as its velocity:

    * The object's velocity increases.

    Here's why:

    * Newton's Second Law of Motion: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically: F = ma, where F is force, m is mass, and a is acceleration.

    * Acceleration and Velocity: Acceleration is the rate of change of velocity. If the net force is in the same direction as the velocity, the acceleration will also be in that direction.

    * Positive Acceleration: Since the acceleration and velocity are in the same direction, the object will speed up.

    Example:

    Imagine pushing a box across a smooth floor. You're applying a force in the same direction the box is moving. This force causes the box to accelerate, and therefore its velocity increases.

    Important Note:

    * If the net force acts in the opposite direction to the velocity, the object will slow down (decelerate).

    * If the net force is perpendicular to the velocity, the object will change direction, but its speed might remain constant.

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