when you are moving upva constant speed in an elevator there are two forces course hero

Where does the force that accelerates the elevator come from?

The force that accelerates the elevator comes from the cable of the elevator. And yes, Normal force is present but comes from the floor of the elevator which always exerts the same force of 98 N to balance the baby and prevent it from plummeting to the center of the earth; and this follows the Newton's third law.

What is the normal force on the shoes in the elevator?

And Newton's first law tells there's no net force on this. So it's just like the first situation. The normal force, the force of the elevator on this toddler's shoes, is going to be identical to the downward force due to gravity. So the normal force here is going to be 98 newtons.

What is the net force on the toddler in the elevator?

So that net force in this situation is the force of the floor of the elevator supporting the toddler. So that force would be an equal force but in the opposite direction. And in this case, that would be the normal force. So in this case, the normal force is 98 newtons in the j direction. So it just completely bounces off.

Why does this toddler accelerate up the elevator?

So here, where the elevator is accelerating upward, the normal force is now 20 newtons higher than it was there. And that's what's allowing this toddler to accelerate.

When you are moving up at constant speed in an elevator?

Answer 1: If the elevator is going at a constant speed, then the person's weight would not be any different than if it were standing still, no matter if the elevator was going straight up or diagonally. To feel a difference in the person's weight, the elevator would have to be accelerating.

What is the net force when the elevator travels at a constant velocity?

N = mg if the elevator is at rest or moving at constant velocity. N = mg + ma if the elevator has an upward acceleration.

Which forces are acting on the train when it moves at a steady speed?

If the train is moving at constant speed, there must be no forces at all acting on the train. If the train is moving at a constant speed, then any forces that might be acting on the train must cancel out.

How do you find force when speed is constant?

0:384:26Force and Constant Velocity - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo if we look at newton's second law equation the sum of the forces equals mass times acceleration.MoreSo if we look at newton's second law equation the sum of the forces equals mass times acceleration. If you substitute in acceleration equals zero in this equation it doesn't matter what the mass.

What two forces act on you while you are in a moving elevator when are these forces of equal magnitude and when are they not?

The two forces acting on a person when he is moving in an elevator is the force of gravity and the normal force by the elevator. The two forces are of equal magnitude, and the elevator is static or moving with constant velocity. Their magnitudes are unequal when the elevator is accelerating upward or downward.

What is the net force on an elevator?

support force F = mass x acceleration + weight For a mass m= kg, the elevator must support its weight = mg = Newtons to hold it up at rest. If the acceleration is a= m/s² then a net force= Newtons is required to accelerate the mass. This requires a support force of F= Newtons.

What causes centrifugal force?

When you swing an object around on a string or rope, the object will pull outward on the rope. The force you feel is called the centrifugal force and is caused by the inertia of the object, where it seeks to follow a straight-line path. It is also called an inertial force or pseudo force.

What is the force acting on an object moving in uniform circular motion that is directed toward the center?

The final motion characteristic for an object undergoing uniform circular motion is the net force. The net force acting upon such an object is directed towards the center of the circle. The net force is said to be an inward or centripetal force.

When two bodies are in direct contact with each other the acting force is called?

Contact forceContact force is a force that is applied by objects in contact with each other. The contact force acts on a point of direct contact between the two objects.

What is force constant?

In physics, a force constant is another term for a spring constant, as defined by Hooke's law. It is a proportionality constant, more precisely. The strength constant k is related to a system's rigidity (or stiffness), the greater the constant of force, the greater the restored force, and the stiffer the system.

What are the forces in constant velocity?

According to Newton's first law of motion, any object moving at constant velocity has no net external force acting upon it, which means that the sum of the forces acting on the object must be zero. The mathematical way to say that no net external force acts on an object is Fnet= 0 or ΣF=0.

Does an object with constant speed have force?

If a body is moving with constant velocity, acceleration is zero. So net force acting on it will be also zero.

What is the external force of an elevator?

The external force is the wire that pulls the elevator. The "actual" normal force comes from the floor of the elevator exerting the same force as the baby's weight (force) which follows Newton's third law. Therefore the baby does not plummet down the earth. And it goes same for the fourth case.

Why does a balloon stay in place?

The balloon stays in place because Buoyancy is a direct consequence of gravity. In free fall, the effective gravity within the elevator is zero (assuming perfect free fall of the elevator, with no air drag) and thus the balloon stays where it is. Comment on Anuranan Rai Deka's post “The balloon stays in plac...”.

Is normal force present in elevators?

And yes, Normal force is present but comes from the floor of the elevator which always exerts the same force of 98 N to balance the baby and prevent it from plummeting to the center of the earth; and this follows the Newton's third law.