This perpendicular force from the tug does not affect the forwards motion of the ship because it is not pulling it forwards or backwards , the component in the forwards/backwards direction is zero. This means it has the samse effect in that direction as no force at all.

So, So, the angle between two forces should be cos⁻¹(1/4). THANKS!

When you have two forces acting on an object, these forces can act in the same direction, opposite direction, or perpendicular direction. The resultant force is the net force.

Yes, any two forces acting along perpendicular directions can be balanced by a resultant force from the point of their intersection.

Resultant Force. The resultant force on an object is: the force left over after equal and opposite forces have cancelled out; the one force which would have the same effect as all of the forces; the vector sum of the forces on the object.

Balanced forces are those that are opposite in direction and equal in size. When forces are balanced there is no change in direction. Combined forces that are balanced are always equal to zero. ( combining vectors) Balance forces cannot change the motion or direction of an object.

Yes! Such an equilibrium situation is called dynamic equilibrium . A body is said to be in equilibrium if the net force acting on the body is zero. Dynamic Equilibrium : When the net force acting on an object is zero and if the object is moving at a constant non-zero velocity, then it is called dynamic equilibrium.

The second condition necessary to achieve equilibrium involves avoiding accelerated rotation (maintaining a constant angular velocity. A rotating body or system can be in equilibrium if its rate of rotation is constant and remains unchanged by the forces acting on it.

Explanation: A body cannot be in the state of equilibrium if only a single force acts on it because we need two or more forces equal in magnitude but opposite in direction to cancel out each other.

Thus a living system is never at equilibrium with its surroundings due to constant exchange of matter and energy between the two. In fact, the living system will not achieve equilibrium even after it dies, since the body decays and this will also create a flow of material and energy between the two.

If there is only one external force (or torque) acting on an object, it cannot be in equilibrium. True, as the sum of forces cannot be zero in this case unless the force itself is zero. If an object is in equilibrium there must be an even number of forces acting on it.

Conditions for equilibrium require that the sum of all external forces acting on the body is zero (first condition of equilibrium), and the sum of all external torques from external forces is zero (second condition of equilibrium). These two conditions must be simultaneously satisfied in equilibrium.

The first condition is that the net force on the object must be zero for the object to be in equilibrium. If net force is zero, then net force along any direction is zero.

When all the forces that act upon an object are balanced, then the object is said to be in a state of equilibrium. The forces are considered to be balanced if the rightward forces are balanced by the leftward forces and the upward forces are balanced by the downward forces.

2. Which one is not the condition for the equilibrium in free body diagram for calculation of the normal forces, consider all forces to be straight and linear? Explanation: For the equilibrium in the three dimensional system of axis we have all the conditions true as, ∑Fx=0, ∑Fy=0 and ∑Fz=0.

Explanation: The force system having all the forces emerging from a point is called the collinear system of force. This is a type of system of the force, which is easy in the simplification. This is because as the forces are the vector quantity, the vector math is applied and the simplification is done.

The Principle of Moments. The Principle of Moments, also known as Varignon’s Theorem, states that the moment of any force is equal to the algebraic sum of the moments of the components of that force.

The theorem states that the torque of a resultant of two concurrent forces about any point is equal to the algebraic sum of the torques of its components about the same point.

The theorem initially stated for two concurrent forces, but, it is true for any number of concurrent or coplanar forces. One of the practical applications of the theorem is to find the unknown reactions when a system is known to be in equilibrium under the action of a number of forces.

It is defined as the product of the force (F) and the moment arm (d). The moment arm or lever arm is the perpendicular distance between the line of action of the force and the center of moments. The Center of Moments may be the actual point about which the force causes rotation.