When more than one force is acting on an object in the same direction, their effects are combined to produce a resultant force. This resultant force depends on the magnitudes and directions of the individual forces.

Explanation:
When multiple forces act on an object in the same direction, we can add their magnitudes together to find the resultant force. The resultant force is the single force that has the same effect as all the individual forces combined.

Factors to consider:
To determine the resulting effect of multiple forces acting in the same direction, several factors need to be considered:

1. Magnitude of the forces: The magnitude of each individual force determines its impact on the object. The larger the magnitude of a force, the greater its influence on the object's motion.

2. Direction of the forces: Although the forces are acting in the same direction, their specific directions are important to determine the overall effect. Forces acting in opposite directions would cancel each other out, while forces acting at different angles would need vector addition to find the resultant.

3. Net force calculation: To calculate the net or resultant force, simply add up the magnitudes of all the forces acting in the same direction. The net force is the sum of these forces and is expressed as a single force acting on the object.

4. Effects on object's motion: The resultant force determines how the object will move. If the net force is zero, the object will remain at rest or continue moving with a constant velocity. If the net force is non-zero, the object will experience acceleration in the direction of the resultant force.

Example:
Consider a car being pushed by two people in the same direction. The first person applies a force of 200 N, and the second person applies a force of 150 N. The resultant force can be found by adding these forces together: 200 N + 150 N = 350 N.

As a result, the car experiences a net force of 350 N in the direction of the forces. This net force will cause the car to accelerate in that direction according to Newton's second law (F = ma), where 'm' is the mass of the car and 'a' is the acceleration.

In summary, when multiple forces act on an object in the same direction, their effects are combined to produce a resultant force. The resultant force depends on the magnitudes and directions of the individual forces, and it determines the object's motion and acceleration.

Their force will be added...and if more than one force is acting on the opposite direction, Net force would be the difference between the two forces applied on the opposite directions.