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Physics
Isaac Newton
Newtons Laws of Motion

# If a book remains stationary on a table are the forces acting upon the book in equilibrium?

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the book cannot change its direction of motion

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## Related Questions All of the forces together balance out. The resultant of the forces is therefore nil. That applies to all equilibrium. Relative to the table, the book remains stationary because there are no outside forces acting on it except gravity which keeps it lying on the table. Yes. A stationary object has a net force of zero acting on it as long as it is stationary, which means the forces acting on it are balanced. If an object is stationary on a surface then the forces acting on it are the Gravitational force and the Normal force(the force of the surface pushing back against the object). Technically you could be pulling(or pushing) that object from opposite directions with equal forces and it would remain stationary. The important thing to understand is that a stationary object remains stationary so long as the net forces applied to it equal zero. The forces acting on a stationary object are:PushPullGravity Static Equilibrium: If some forces are acting on a body horizontally or vertically, and the body remains it states of rest is called Static Equilibrium. Formula: &sum;Fx =0 &sum;Fy =0 Example: a book lying on a table. Dynamic Equilibrium: If some forces are acting on a body horizontally or vertically, and the body remains it states of motion is called Dynamic Equilibrium. Formula: &sum; =0 Example: a train is moving with uniform velocity. The forces acting on a stationary object are balanced. If you were to add up all the forces (taking the directions into account, you would get a total of 0. There are always forces acting on a object, such as gravity, so you cannot say that there are no forces acting on it. You can say that the forces are balanced. Static equilibrium in physics means that an object is stationary. There is no rotation or motion to it. An example of this would be a column supporting a building. There are physical forces acting on it, but there is no motion in the object.  Dynamic Equilibrium: If some forces are acting on a body horizontally or vertically, and the body remains it states of motion is called Dynamic Equilibrium. Formula: &sum; =0 Example: a train is moving with uniform velocity. Equilibrium is a state in which all forces acting on an object are in balance. It can be in equilibrium if in constant motion (constant velocity) as no forces are acting on it (no acceleration) When the forces acting on the object are stable  It will remain stationary if it is stationary, and it will remain in uniform motion if it is in motion. Stating that an object is in a state of equilibrium means that it has no forces currently acting on it. An object without forces acting upon it has no acceleration or deceleration. This means that if it was already moving, it would continue moving in the same direction and at the same speed (i.e. it would have constant velocity). If it was not moving, it would continue not moving (i.e. it would be stationary). An equilibrium is the state of a body at rest or in uniform motion in which the result of the forces acting upon it is zero. A body is mechanical equilibrium if the sum of the net forces acting upon it is zero.  It is in Equilibrium and there are no forces acting on it.  It is in equilibrium when the two conditions are satisfied - there is no net translational equilibrium and no net rotational equilibrium. For translational equilibrium, the summation of forces acting on the matter must equate to zero, which means that there is no resultant force. For rotational equilibrium, the sum of moments must be zero, which means there is no resultant torque. When these two conditions are met, the object will be stationary, i.e. it is in a state of equilibrium. If an object is not moving or if it is moving with a constant velocity (meaning there is no acceleration), the sum of the forces acting on it is equal to zero. A stationary object is said to be in static translational equilibrium, while an object with a constant velocity is said to be in dynamic translational equilibrium. Typically, an object at rest on the ground has two forces acting on it: Gravity and the Normal force of the ground. Normal force counters gravity and prevents things from falling through the ground.  The object is in equilibrium. The object will not accelerate.

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