When you can t pull a heavy object, is gravity equal to pulling

When you can't pull it, the pulling force is not equal to the gravitational force, and the gravitational force is greater than or equal to the pulling force, which is not a pair of balancing forces. Isn't it pulled up when the object is balanced? When the object is not moving, the pulling force plus the support force of the table against the object is equal to the gravitational force.

i.e. f+fn=mg. (fn is the support force) before you pull up, the more force you use, the less the support force of the table to the object, instead of the gravity change. Gravity is only related to the mass of the object and the local gravitational acceleration value.

You forget the support force of the ground, when you can't pull up, the vertical downward gravity = vertical upward pull + the supporting force of the ground.

Gravity is constant. When it can't be pulled, when the pulling force changes, the support force of the ground changes.

Hello! Gravity is constant [g = mg (m is known, g is constant quantitative)]. When a heavy object is pulled off the ground, the pull and gravity are a pair of balancing forces.

When the weight does not break away from the ground under the action of tension, the tension f + the support force of the ground on the weight n = the gravity g of the weight. When the pulling force is not enough to lift heavy objects, the greater the pulling force, the smaller the supporting force; The smaller the pull, the greater the support!

When you can't pull a heavy object, the gravitational force is greater than or equal to the pulling force.

If at a critical point, that is, a state that is about to be pulled up without being pulled up, the gravitational force is equal to the pulling force.

If it is far from being pulled up, the gravity is greater than the pulling force.

Gravity is constant and is only related to the mass of the object and g.

The idea should be this, the inability to pull means that the force is balanced, and the object receives a total of three forces, gravity, tension, and support from the ground. When it can't be pulled, it means that gravity = support force + pulling force; In this case, the greater the pulling force, the smaller the support force; When the pulling force = gravity, the supporting force is 0, i.e., the object happens to be pulled.

Gravity = m * g, is constant, when you can't pull a heavy object, pull force = gravity.

When pulling a heavy object diagonally, the magnitude of the pulling force does not change because the pulling force can be broken down into two components, one parallel to the ground and the other perpendicular to the ground. The component force parallel to the ground is the force exerted on a heavy object that is used to overcome gravity and make the weight move along an inclined plane. The component perpendicular to the ground is counteracted by the inclined reaction force and does not affect the movement of the heavy object.

According to the definition of trigonometric function, when the inclination angle of the inclined plane is constant, the angle between the weight on the inclined plane and the horizontal plane is the same, so when the weight is pulled diagonally, the magnitude of the pulling force does not change. However, due to the different inclination angles of the inclined plane, the direction and magnitude of the force applied to the heavy object will be different, so the direction and magnitude of the force applied need to be adjusted according to the specific situation to ensure that the heavy object moves smoothly along the inclined plane.

When we pull a heavy object diagonally, the magnitude of the pulling force does not change, because the magnitude of the pulling force is only related to the mass and acceleration of the object, not the direction of the pull. The magnitude of the pulling force can be described by Newton's second law, which is f=ma, where f is the magnitude of the pulling force, m is the mass of the object, and a is the acceleration of the object. When we pull the weight diagonally, neither the mass and acceleration of the object change, so the magnitude of the pulling force does not change either.

The difference is that when pulling a heavy object diagonally, a greater force needs to be applied to produce the same acceleration because a part of the pulling force is used to overcome the gravitational force perpendicular to the inclined plane, and only the remaining pulling force can produce the acceleration of the object. Therefore, a greater force needs to be applied when pulling a heavy object diagonally, but the magnitude of the pulling force still does not change.

When you pull a fixed weight diagonally with your hands, two forces are applied at the same time: one in the horizontal direction and the other in the vertical direction. These two forces make up a diagonal upward pulling force.

It is important to know that when you pull a heavy object diagonally, only the force in the horizontal direction is actually pulling the object. Whereas the direction of force of the weight is vertically downward, it does not change, so the force in the vertical direction does not change either.

In this case, the magnitude of the pulling force pulled diagonally is the same as the magnitude of the force in the horizontal direction, since this angle can be resolved into a horizontal component and a vertical component. Thus, only the horizontal component exerts a pulling force on the object, while the vertical component exerts only a vertical downward gravitational force on the object and does not produce an actual pulling force.

This also means that when pulling a heavy object diagonally, you need to exert more force relative to the vertical direction. If you pull a weight directly, you only need to exert equal force to gravity. But if you pull diagonally, you need to exert more force to overcome gravity and friction horizontally.

When pulling a heavy object diagonally, the magnitude of the pulling force remains unchanged, mainly because the magnitude of the oblique pulling force can be obtained by combining the horizontal tension force and the vertical tension force. The horizontal pull is used to overcome the inertia and friction of the weight in the horizontal direction, while the vertical pull force is used to overcome the force of gravity. Since diagonal pulling essentially decomposes the pulling force into horizontal tension and vertical tension, the magnitude of the pulling force does not change, but the direction and components change.

Specifically, when pulling heavy objects, people usually use oblique pulling to reduce friction in the horizontal direction and improve pulling efficiency. Assuming that the mass of the object is m, the tensile force is f, and the angle between the inclined plane and the horizontal plane is , then the horizontal tensile force required for diagonal pulling is fcos, and the vertical tensile force is fsin. The magnitude of the diagonal pull force can be calculated by the Pythagorean theorem, i.e., the magnitude of the oblique pull force is (f2cos2 f2sin2 )=f.

Therefore, when the weight is pulled diagonally, the magnitude of the pulling force does not change.

Pull is not equal to gravity. Tension is defined by the effect of the force, from the nature of the force, the tension force is also an elastic force, whereas from the object of the force, the tension force may be an internal force or an external force. The force exerted on an object due to the attraction of the earth is called gravity.

Pull

Within the elastic limit, the deformation of an object by an external force is proportional to the external force exerted. The deformation varies depending on the direction in which the force acts, and the force that causes the object to extend is called "pull" or "tension". (Push, pull, lift, pressure, and buoyancy are collectively referred to as: pull).

Gravity

The direction of gravity is always straight downwards. The gravitational force experienced by the object is proportional to the mass of the object, and the calculation formula is: g=mg, g is the proportionality factor, the magnitude is about, the gravitational force changes with the change of latitude, and the gravitational force of an object with a mass of 1kg is.

The point at which gravity acts on an object is called the center of gravity.

The magnitude of gravity can be measured with a dynamometer, and the magnitude of the pull or pressure of an object moving in a stationary or uniform linear motion on the dynamometer is equal to the magnitude of gravity.

The title should refer to a situation similar to bungee jumping and destroying a circle to do exercise. As shown in the figure is a simplified schematic diagram of bungee jumping, one end of the elastic rope is fixed at point O, and the other end is tied to the athlete, the athlete falls freely from point O, and the elastic rope is naturally straightened at point A. Point B is the point where the pull of the elastic rope on the athlete is equal to the point where its gravity is balanced, and point C is the lowest point reached by the bungee jumper. From A to B, the gravity is greater than the elastic force, there is a downward acceleration, the velocity gradually increases, and the maximum value is reached at point B, and from the cavity B to C, the rope tension is greater than the gravity, and the velocity gradually decreases until 0.

At point b, the tension and gravity are balanced, and the velocity reaches its maximum value.

The question you ask is only suitable for linear motion in the horizontal or vertical direction, such as elastic vibration, vertical fall of raindrops in the absence of wind.

According to Newton's second law, the direction of acceleration of an object coincides with the direction of the resultant force. Since one of the resultant forces experienced by the object is a constant force, such as gravity or sliding friction, and a variable force, such as air resistance or elastic force, the resultant force is variable.

When the direction of the resultant force coincides with the direction of acceleration, the changing force is in an increasing state and the velocity is in an increasing state. When the varying force increases to equilibrium with the constant force, the velocity reaches its maximum. This position is called the equilibrium position, and the instantaneous liquid addition speed is zero.

this, if the changing force is also in a constant state, the object moves in a straight line at a uniform speed. If the changing force is still increasing, the direction of the resultant force will change, and the object will slow down in the opposite direction of motion in the opposite direction of the object, until the velocity becomes zero, and then start to move in the opposite direction. In this case, the speed of the object at the equilibrium point is the maximum.

This is only suitable for vertical movements.

Under the condition that the tensile force is constant, when the object reaches the maximum velocity in the vertical direction, the net force on the object is zero, that is, the heavy delay belt force = the force of the pulling force. (Otherwise, it will inevitably continue to add the speed of the Ant Forest).

Camel, Valta, Sail these battery brands, many car companies will use these brands of batteries as the original battery.

Tensile force: Within the elastic limit, the deformation of an object by an external force is proportional to the external force exerted. The deformation varies depending on the direction in which the force acts, and the force that causes the object to extend is called "pull" or "tension".

Thrust, pull, lift, pressure, and buoyancy are collectively referred to as tension) If the object is subjected to two forces, resistance and tension, if the object moves in a straight line at a uniform speed, then at this time f pull = f resistance, tension and resistance are a pair of balanced forces, and the object is in a state of equilibrium of two forces (the resultant force is zero). If the object is moving at an accelerated pace, then f pulls >> f resists. If the object is in deceleration motion, then when the car moves in a straight line at a uniform speed, the pulling force (traction force) is balanced with the frictional force. The pulling force is abbreviated as f, and the unit of force is Newton, referred to as ox, and the symbol n. Tension is defined by the effect of the force, and from the nature of the force, the pull force is also an elastic force.

And from the point of view of the object of force, the pulling force may be an internal force or an external force. Tensile formula: f=ng

Tension: The mutual traction force that exists inside an object and is perpendicular to the contact surface of two adjacent parts when it is subjected to a tensile force.

Physical experiment - the relationship between the tensile force f and the weight g when using a pulley block.

The object rises, that is, the direction of velocity is upward, and the pulling force is less than the gravitational force, that is, the resultant force of the pulling force and the gravitational force is downward, and the direction of the resultant force is opposite to the direction of velocity, then the object will do deceleration motion.

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The net force is zero: the object is at rest or in a straight line at a uniform speed.

The resultant force is in the same direction as the velocity: accelerates in a straight line.

The resultant force and the velocity are reversed: decelerate in a straight line.

The resultant force is not zero and is neither in the direction nor in the opposite direction of the velocity (i.e., not in the same straight line): curvilinear motion.

Answer: Because of the object on the craneIt turned out to be an upward movementWhen subjected to the balance force, the state of motion remains unchanged and still moves upward.

Analysis: When the object is subjectedEquipoise, i.e., when the resultant force is zero, the motion state of the object does not change.

1.What was still will remain still;

2.The original motion will maintain the original velocity, magnitude and direction, and do a uniform linear motion.

Hello! Shan Xingling.

When the object is at rest, the two forces are balanced. (The basic condition of the balance of two forces: stationary or uniform motion) and your "pulling object does not move", so the balance of two forces (tension and friction--- tension and friction are canceled, and the static friction is the reason, so it cannot be pulled, so it is equal) (Note:

Here gravity and support cancel out, there is no effect on tension and friction)

So: the tensile force is equal to the static friction force.

Understood, yours is my biggest move, if you don't understand, welcome to continue to ask!

It is equal to static friction, and the maximum static friction is similar to sliding friction, and if it is pulled, it is sliding friction, so it is less than the maximum static friction.