Calculating the net force acting on object in diagram

In summary, net force is the overall force acting on an object, taking into account all of the individual forces acting on it. It is important to calculate because it determines the acceleration and movement of the object. To calculate the net force, all individual forces acting on the object must be identified and added or subtracted depending on their direction. Balanced forces result in a net force of zero, while unbalanced forces result in a net force that is not equal to zero, causing a change in the object's motion. The direction of the forces is crucial in determining the net force, as forces in the same direction add to each other while forces in opposite directions subtract from each other. The net force will always be in the same direction as the resulting
  • #1
Evangeline101
112
5

Homework Statement


Calculate the net force acting on each object in the following diagrams. Show your work.

upload_2016-5-4_15-14-44.png


Homework Equations


upload_2016-5-4_14-59-12.png

[/B]
upload_2016-5-4_14-59-33.png


The Attempt at a Solution


c2= a2 + b2 - 2abcosC
c = (a2 + b2 - 2abcosC) 1/2

c = [ (32.0 N)2 + (38.0 N)2 - 2 (32.0 N) x (38.0 N) cos 55° ] 1/2
c = 32.8 N

upload_2016-5-4_14-59-33.png


sinA/ 38.0 N = sin55° / 32.8 N

A= 72°

Fnet = 32.8 N [ N 72° E]

Can someone please check my answer and tell me if it is correct? Thanks.
 
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  • #3
Okay, thanks for linking that thread.
 

What is net force and why is it important to calculate?

Net force is the overall force acting on an object, taking into account all of the individual forces acting on it. It is important to calculate because it determines the acceleration and movement of the object.

How do you calculate the net force acting on an object?

To calculate the net force, you must first identify all of the individual forces acting on the object. Then, you can add or subtract these forces depending on their direction to find the net force.

What is the difference between balanced and unbalanced forces?

When the net force on an object is equal to zero, the forces are considered balanced. This means that the object will remain at rest or continue moving at a constant velocity. Unbalanced forces occur when the net force is not equal to zero, resulting in a change in the object's motion.

How does the direction of the forces affect the net force?

The direction of the forces is crucial in determining the net force. Forces acting in the same direction will add to each other, while forces acting in opposite directions will subtract from each other. The net force will always be in the same direction as the resulting force.

Can the net force ever be negative?

Yes, the net force can be negative. This means that the forces acting on the object are in opposite directions, resulting in a net force that is less than zero. Negative net force can cause the object to decelerate or move in the opposite direction of the resulting force.

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