# How do elevators solve physics problems?

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.

How do elevators work physics?

The elevator’s free-body diagram has three forces, the force of gravity, a downward normal force from you, and an upward force from the tension in the cable holding the elevator. The combined system of you + elevator has two forces, a combined force of gravity and the tension in the cable.

Why do you feel lighter when an elevator goes down physics?

This can also make you feel lighter: when the elevator slows down, you need to slow down with it. But gravity is always pulling you down, so for you to slow down, the floor needs to push up on you less, so gravity can slow you down. Since the floor pushes on you less, you feel lighter.

How does Newton’s first law apply to an elevator?

Physics 4 Newton’s Laws of Motion (5 of 20) First Law: Example 1 – YouTube

Why do you feel heavier in an elevator going up physics?

If you stand on a scale in an elevator accelerating upward, you feel heavier because the elevator’s floor presses harder on your feet, and the scale will show a higher reading than when the elevator is at rest. On the other hand, when the elevator accelerates downward, you feel lighter.

## Why does normal force change in an elevator?

From Newton’s second law F=ma, acceleration requires a force proportional to mass. So when the elevator is accelerating upwards, it must not only oppose gravity but provide extra force for the upward acceleration. This requires an increased normal force.

## What is normal force in physics?

The normal force is the force that surfaces exert to prevent solid objects from passing through each other. Normal force is a contact force. If two surfaces are not in contact, they can’t exert a normal force on each other.

## How does an elevator slow down?

The Elevator (1 of 2) A General Discussion of weight and tension.

## What is the behavior of light when the elevator maybe accelerating upward or maybe acted by gravity?

Since the accelerated elevator moves up during the time light travels across the elevator, the beam of light strikes low, seeming to the person to bend down. (Normally a tiny effect, since the speed of light is so great.)

## 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.

## How are elevator algorithms implemented?

Now the elevator should first go to 1st floor and then 5th.

A good structure to use for this algorithm is three priority queues:

1. For the current direction with entries past the current point,
2. For the opposite direction, and.
3. for the current direction prior to the current point.

## How does acceleration work in an elevator?

This is an application of Newton’s second law to the forces felt in an elevator. If you are accelerating upward you feel heavier, and if you are accelerating downward you feel lighter. If the elevator cable broke, you would feel weightless since both you and the elevator would be accelerating downward at the same rate.

## How does Newton’s 3rd law of motion affect your motion in an elevator?

Since your true weight remains the same, the net force arises because the elevator exerts a smaller normal force on you which is matched from Newton’s Third Law by an equal force downwards on the elevator (this downwards force is your apparent weight measured by weighing scales I believe).

## What happens to the reading on the scale when the elevator stops moving?

If the elevator is stopped, the scale reads what you would expect it to read, your weight in an elevator. The same is true when the elevator is moving at a constant velocity. There elevator is in equilibrium. You may notice that when the elevator begins to move, your weight seems to change.

## When an elevator is moving upward the apparent weight of a body inside elevator?

So, when a lift accelerates upwards, the apparent weight of the person inside it increases. So, when a lift accelerates downwards, the apparent weight of the person inside it decreases. R = m(g – g) = 0. Thus, the apparent weight of the man becomes zero.

## Does your weight change in an elevator?

The mass of an object does NOT CHANGE in a moving elevator, it is the weight which changes. The mass of an object does NOT CHANGE in a moving elevator, it is the weight which changes. You can see that the scale reads higher than your normal “weight” m because “a” is positive (m and g are always positive).

## Why does normal force decrease as angle increases?

Putting “Friction on an Incline” in Conceptual terms: With an incline, the force of gravity is not perpendicular to the surface. As the angle of the incline is increased, the normal force is decreased, which decreases the frictional force.

## How does normal force affect friction?

In other words, the normal force is the force pushing the two surfaces together, and the stronger the normal force, the stronger the force due to friction.

## What does FF mean in physics?

Force of Friction (Ff) Force that opposes the motion of an object.

## What does FK mean in physics?

fk is the force of kinetic friction (in the –x. direction), N. F is the vertical normal force exerted by the floor (in the. +y direction), and mg.

## How do you find FN in physics?

Normal Force Formula

1. The normal force will be equivalent to the weight of the object only if the object is not accelerating i.e. decelerating. …
2. F_N = mg. …
3. F_N = mg + F sin,theta. …
4. F_N = mg – F sin,theta. …
5. F_N = mg cos,theta. …
6. Angle theta = 30°
7. Sin 30° = frac{1}{2} …
8. F_N = mg + F sin,theta.

## How fast do elevators accelerate?

Let’s start with the turtle like speed of most elevators you will find, believe it or not, most elevators are designed to travel at a blazing 100 to 200 feet per minute or between 1.14 and 2.27 miles per hour for buildings 10 stories or less.

## How much does an elevator weigh?

Overview. The capacity of a standard elevator can vary somewhat depending on how it was built and where it is used, but in general the range is between 2,100 and 6,000 pounds (about 454 to 2,722 kg).

## In what direction is the net force as the elevator slows to a stop as it is moving down?

Net force is pointed downward because accelerating downward (so it is a negative number). Thus, the force of tension is less than the weight of the elevator.

## Why does light bend in an elevator?

When an elevator accelerates in empty space, where, presumably, the direction of acceleration is from the floor to the ceiling of that elevator, then light should bend toward the ceiling.

## How does General Relativity explain why the planets orbit around the sun?

The Sun is the largest object in our Solar System, so, according to Einstein’s General Theory of Relativity, the Sun will “warp” spacetime in the Solar System by the largest amount. The planets simply follow the shortest path through spacetime around the Sun, thus explaining their orbits.

## What causes the light to bend when it passes near a massive object like sun?

Gravity bends light

Light travels through spacetime, which can be warped and curved—so light should dip and curve in the presence of massive objects.

## Is the force of gravity stronger on a piece of paper when it is crumpled?

The force of gravity is the same on each because the masses are the same, as Newton’s equation for gravitational force verifies. When dropped, the crumpled paper falls faster only because it encounters less air drag than the sheet. … The acceleration due to gravity is greater at sea level.

## Is gravitational force acting on a person who falls off a cliff on an astronaut inside the international space station?

The answer is yes. The gravitational force acts on both cases. Both are under the influence of Earth’s gravity. The force of gravity will act on the person falling off a cliff as well as on the astronaut inside an orbiting space shuttle.

## Is gravitational force acting on a person who falls off a cliff on an astronaut inside an orbiting space shuttle?

On an astronaut inside an orbiting space shuttle? Gravitational force is indeed acting on a person who falls off a cliff, and on a person in a space shuttle. Both are falling under the influence of gravity.

## What data structure will you use to implement an elevator?

Each lift maintains a queue(data structure). The number of elements in the queue is the maximum number of stops a lift can have. The first element in the queue is its current floor.

## How do you optimize an elevator?

Figure out the overall average wait time. Determine the times during the day where the wait times are longer. Determine the floors where the elevator wait times are longer. Provide a minimum of 2 recommendations on how to optimize the elevators’ configuration to reduce wait times.

## How do elevators work physics?

The elevator’s free-body diagram has three forces, the force of gravity, a downward normal force from you, and an upward force from the tension in the cable holding the elevator. The combined system of you + elevator has two forces, a combined force of gravity and the tension in the cable.

## How do elevators use physics?

When the elevator is going up, though, you are accelerating, which adds more force to the scale and increases your apparent weight. When the elevator is going down, the same is true, but the acceleration is negative, subtracting force from the scale and decreasing your apparent weight.

## How do elevators work?

Elevators work via a pulley-esque system whereby a metal rope connects to the top of the elevator car that travels through a “sheave” in the engine room, according to Discovery. Thus, the sheave acts as a pulley wheel featuring grooves to hold onto the metal rope (also known as a cable) securely.

## Why do you feel heavier in an elevator going up physics?

If you stand on a scale in an elevator accelerating upward, you feel heavier because the elevator’s floor presses harder on your feet, and the scale will show a higher reading than when the elevator is at rest. On the other hand, when the elevator accelerates downward, you feel lighter.

## How do elevators use Newton’s first law?

Physics 4 Newton’s Laws of Motion (5 of 20) First Law: Example 1 – YouTube

## Why does normal force change in an elevator?

From Newton’s second law F=ma, acceleration requires a force proportional to mass. So when the elevator is accelerating upwards, it must not only oppose gravity but provide extra force for the upward acceleration. This requires an increased normal force.

## What does the scale read when the elevator is moving up at constant speed?

The scale reads the Normal Force which is opposed by the Force of Gravity on the person alone. Remember: The scale reads the Normal Force, equal and opposite to the Force of Gravity if there is no acceleration.

## What force does the scale read?

Generally, a scale will measure the normal force it supplies to the object resting on it. In the special case where the scale is stationary (as it appears in your picture), this is equal to mg, or the weight of the object.

## When an elevator accelerates downward your weight reading is?

If the elevator accelerates downward, a is negative, and the apparent weight is less than the true weight. If the elevator falls freely, , and the apparent weight is zero.