Calculating Net Force
Part 1: For objects that are moving
Directions:
1. Assume that the object is moving towards the right
2. Calculate the net Force (Show ALL of your work)
Net Force = (All the same direction forces added up) – (All the opposite direction forces added up)
3. State if the object is speeding up, slowing down, or moving at a constant speed.
4. State if the forces are balanced or unbalanced
1.
Net force = (66N) - (66N + 66N) = 66N Backwards
The object is slowing down
The forces are unbalanced |
2.
Net force = (124N) - (32N) = 92 N Forwards
The object is speeding up
The forces are unbalanced |
3.
Net force = (33N + 55N + 20N) - (77N + 31N) = 0N
The object is moving at a constant speed
The forces are balanced |
4.
Net force = (124N + 41N) - (52N) = 113 N
The object is speeding up
The forces are unbalanced |
Part 2: For objects that are stationary
1. Assume that the object is not moving
2. Calculate the net Force (Show ALL of your work)
Net Force = (All the same direction forces added up) – (All the opposite direction forces added up)
3. State if the object will move left, right, up, down, or combination of some of those
4. State if the forces are balanced or unbalanced
5.
Left Right Net Force = (88N) - (88N) = 0N
Up Down Net Force = (134N) - (53N) = 81N Down
The object will move down.
The forces are unbalanced. |
6.
Left Right Net Force = (88N) - (178N) = 90N Left
Up Down Net Force = (75N) - (90N) = 15N Up
The object will move left and up.
The forces are unbalanced. |
7.
Left Right Net Force = (88N) - (44N + 44N) = 0N
Up Down Net Force = (15N + 75N) - (110N) = 20N Up
The object will move up.
The forces are unbalanced. |
Summary:
Summary
|
| Net force, net being used in terms of "total", is the overall force being applied to an object. If there are two forces on a single side, they are added together because they are resilient to the force on the opposite side. The difference between the amount of force on each side is the amount of net force for an object, and determines the speed of said item if it is already in motion. Should the two forces cancel each other out by adding up to 0N, then the translation is that the object is moving at a constant speed. If the object is not in motion, then the direction of the object should it be placed in motion is what is determined by the net force. Finding the net force if the object is not moving is the same procedure as when finding the net force for a moving object, with the only exception being that two additional force directions have been added (up and down), of which the net force is found the same was as left and right. If all the forces cancel each other out, once more adding up to 0N, then the object is not moving, nor will it ever in any direction given. |
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