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If the object's speed is constant, then its kinetic energy is too.
So none of its energy has been robbed to do external work.

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What the apparent weight if the lift moves downward with constant speed?

If you are in a lift (elevator) moving at constant speed, whether up or down, and you have no visual contact with the outside, then you don't know that the lift is moving, and no physical experiment can detect the motion. Your apparent weight is the same as when you're at 'rest'.


Are you agree that your weight is equivalent to the friction force. Why?

No. On a horizontal surface the normal force is equal to weight. If you are moving at constant velocity you only overcome frictional force, which is not equal to weight. This is easier to see on an incline. At some point an object will slide at constant velocity down the incline. This is related to trig functions of the angle of incline multiplied by the weight which is always less than the weight.


Weight of a freely falling body?

If the 'weight' of a body is the gravitational force between the body and the Earth, then as long as the body stays at about the same distance from the center of the Earth, its weight is constant, and has no connection with its motion.


Is weight of body maximum at poles?

No, the weight of a body remains the same regardless of its location on Earth. Weight is determined by the mass of the object and the strength of gravity, which is relatively constant across the Earth's surface.


What is the relationship between weight and pressure?

Pressure varies with height as a function of specific weight. p=p0+specific weight*height Where height is the distance below the reference pressure p0 (usually at a free surface).

Related Questions

What the apparent weight if the lift moves downward with constant speed?

If you are in a lift (elevator) moving at constant speed, whether up or down, and you have no visual contact with the outside, then you don't know that the lift is moving, and no physical experiment can detect the motion. Your apparent weight is the same as when you're at 'rest'.


Why don't we notice a difference between mass and weight on earth?

We don't notice a difference between mass and weight on Earth because the acceleration due to gravity is constant on the surface of the Earth. Weight is the force of gravity acting on an object's mass, so as long as the acceleration due to gravity remains constant, the weight of an object will be proportional to its mass.


Are you agree that your weight is equivalent to the friction force. Why?

No. On a horizontal surface the normal force is equal to weight. If you are moving at constant velocity you only overcome frictional force, which is not equal to weight. This is easier to see on an incline. At some point an object will slide at constant velocity down the incline. This is related to trig functions of the angle of incline multiplied by the weight which is always less than the weight.


What happens to your weight if you move from the equator of the earth and start moving towards the equator?

In that case, your weight remains absolutely constant and does not budge one iota.


How does speed increase the weight of a moving body?

Speed does not increase the weight of a moving body. Weight is determined by the mass of the object and the force of gravity acting on it, and it remains constant regardless of speed. Speed only affects the kinetic energy of the body, which is proportional to the square of the speed.


Why don't we notice a difference between mass and and weight on Earth?

Because gravity is relatively constant anywhere on Earth's surface.


Weight of a freely falling body?

If the 'weight' of a body is the gravitational force between the body and the Earth, then as long as the body stays at about the same distance from the center of the Earth, its weight is constant, and has no connection with its motion.


Is weight of body maximum at poles?

No, the weight of a body remains the same regardless of its location on Earth. Weight is determined by the mass of the object and the strength of gravity, which is relatively constant across the Earth's surface.


Why do you have to exert extra force to get a heavy object moving and then have to keep applying force to keep it moving at constant velocity?

the heavier and the bigger the object the more force you need to use to keep it moving . the less weight and the smaller an object is the less force you need to use to keep it moving. it always depends on the weight of the object and the size of the object.


What is the relationship between weight and pressure?

Pressure varies with height as a function of specific weight. p=p0+specific weight*height Where height is the distance below the reference pressure p0 (usually at a free surface).


If mass is constant and weight is a force that depends on location why is weight on Earth independent of location?

Weight on Earth is not completely independent of location, as it can vary slightly depending on the distance from the center of the Earth. However, these variations are generally negligible at everyday scales. The weight of an object on Earth is primarily determined by the acceleration due to gravity, which is relatively constant at the surface of the Earth regardless of location.


How would the weight of an object change if it is initially weighed in Delhi to poles and them takens to the pole?

The weight of an object would not change when moving from Delhi to the North Pole. Weight is a measure of the force of gravity acting on an object, and since gravity is relatively constant on Earth's surface, the weight of an object remains the same. The only factor that can affect weight is altitude, but the difference in altitude between Delhi and the North Pole is negligible in terms of gravity's impact.