How To Find Net Force: The net force is the force that acts on an object in a direction perpendicular to the direction of motion of that object. The net force acting on the rope is the force of gravity acting downwards. If you consider a particle’s motion as a particle’s motion, then the net force acting on the particle is the force of gravity acting downwards. Suppose you have a rocket ship accelerating away from the Earth.
The net force acting on the rocket ship is the force of gravity acting downwards. The rocket ship has a mass and a velocity so that we can write Newton’s second law for it: $$F = m \frac{dv}{dt}$$ If we assume that the rocket ship is moving in a straight line at a constant speed $v$ and is not affected by any other forces, then the equation becomes:
Some Examples in Net Force Equation Physics
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Example 1
In a game of rope pulling, a fat man pulls with a force of 100 N from one side, and a lean man pulls with 90 N from the other side. What will be the net force?
Solution:
Given
Force F1 = 100 N and
Force F2 = 90 N
The net force formula is given by
FNet = F1 + F2
FNet = 100 + (-90)
FNet = 10 N.
Therefore, the net force is 10 N.
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Example 2
A truck is standing still, and a force of 70 N is applied to it. What will be the net force if the frictional force is 20 N?
Solution:
Given
Applied force Fa = 70 N
Frictional force Ff = 20 N
The net force formula is given by
FNet= Fa + Ff
FNet = 70 + (-20)
FNet = 50 N
Therefore, the net force is 50 N.
How Do You Find Net Force with Mass?
The key is in the word “with.” The net force (N) is equal to the product of the mass (m) and the acceleration (a). For example, if a car is moving at 60 mph, the net force acting on the car is 1,000 newtons (N). This is the same as saying that 1,000 newtons of force are acting on the car. But what does it mean for something to be acting on something else?
If you were to lift a block of wood from the ground, then you would have a force of 1,000 newtons acting on the block of wood. The block of wood has no mass, so it will accelerate away from the force of 1,000 newtons with an acceleration of 1,000 newtons per second squared (N/s²).
Conclusion
Newton’s first law explains the dynamics of a force on a body at rest and in motion very accurately. According to Newton’s second law, the magnitude net force formula is derived by taking into account the body’s mass and is written as FNet = ma.
The equation above can be written as Fnet = m a ⇒ m a = Fnet. According to this equation, when there is no net force acting on a body, then the body’s mass remains constant. As the net force is zero, the acceleration of the body is also zero. Suppose the mass of the body decreases, then the acceleration of the body increases. Similarly, if the mass of the body increases, then the acceleration of the body decreases.
Read Also: How To Find Surface Area of a Rectangular Prism
FAQS On How To Find Net Force
Q: How do I find the net force on an object?
A: To find the net force, you need to identify all the forces acting on the object, determine their magnitudes and directions, and then add them up using vector addition.
Q: What is the formula for net force?
A: The formula for net force is Net Force = F1 + F2 + F3 + … + Fn, where F1, F2, F3, and Fn are the individual forces acting on the object.
Q: What are vector quantities?
A: Vector quantities are physical quantities that have both magnitude and direction, such as force, velocity, and acceleration.
Q: How do I add forces together to find the net force?
A: To add forces together, you need to use vector addition, which takes into account both magnitude and direction. If the forces are all acting in the same direction, you simply add their magnitudes. If the forces are acting in different directions, you need to use trigonometry to determine the vector sum of the forces.
Q: What happens if the net force on an object is zero?
A: If the net force on an object is zero, the object will remain in a state of rest or uniform motion.
Q: How does the net force affect an object’s motion?
A: The net force acting on an object determines its acceleration and therefore affects its motion. If the net force is zero, the object will remain in a state of rest or uniform motion. If the net force is non-zero, the object will accelerate in the direction of the net force.
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