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A person is on an elevator that moves downward with an acceleration of 1.8 ms squared. If the person weighs 686 n what is the net force on the person?
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When riding in an elevator why does a person appear to lose weight when accelerating downward?
Weight is felt by the body resisting the pull (acceleration) of gravity. Less acceleration means less pull thus less weight. The rate at which you are accelerating downward subtracts from the pull of gravity, thus your weight is less. If you fall, say from a cliff or tall building you accelerate downward at exactly the acceleration of gravity so you're completely weightless.
What does an air bag do to the acceleration of the person as they land compared to hard ground and how does this change the net force on the person as they land compared to hard ground?
The airbag reduces the deceleration experienced on impact. In terms of acceleration, this means that the airbag has lowered the rate at which the downward acceleration decreases.If a falling person hits solid ground then their velocity goes from high to zero almost instantaneously. This means that the downward acceleration has changed very quickly. The airbag increases the time in which it takes the velocity to fall to zero. This is the same as saying it reduces the deceleration.Of course an airbag has the additional benefit of being soft relative to the ground, but simply considering acceleration/deceleration, reducing this lessens the harm done to the person. A high rate of acceleration/deceleration by itself can cause death/serious injury as a person's internal organs rupture due to the sudden collision with the other parts of the body (bones for instance). An airbag is helping by reducing the rate of change of the downward acceleration to a more survivable level. The force on the person is therefore lowered on "landing".
A 60 kg person stands on a scale in an elevator. (a) What does the scale read (in N) when the elevator is at rest N (b) What does it read when the elevator is climbing at a constant speed of 4.5 ms N?
We must use: (Force) = (Mass) x (Acceleration) Force = 400 N Acceleration = 9.8 m/(s^2) Mass = M 400 N = ( M ) x ( 9.8 m/(s^2)) After calculating, we find the mass of the man to be 40.82 kg.
A person jumps off a diving board 4.0m above the water's surface into a pool the person's downward motion stops 2.0m below the surface of the water estimate the avg. decleration of the person under wa?
so what you need to do is find the velocity that the person enters the water and then use the equation v sub final squared = v sub initial squared + 2*acceleration(final distance-initial distance). final velocity is zero, find the initial velocity yourself and use 2 as the final distance where the initial distance is 0, solve for acceleration. Easy way: the decelleration would have been twice that provided by gravity because the diver decellerated to zero in half the distance of the dive. The diver starts at zero and hits max velocity in 4 meters then goes from max velocity to zero in 2 meters. 2 x 9.81 m/s2 = ___
Which of these is true of a person walking up the steps of a downward-moving escalator a a constant speed?
Here are some things that are true:* The combined speed is also constant * To get the combined speed, you need to subtract one speed from the other (the speed of the escalator, and the speed of the person relative to the escalator) * Acceleration is zero
When riding in an elevator why does a person appear to lose weight when accelerating downward?
Weight is felt by the body resisting the pull (acceleration) of gravity. Less acceleration means less pull thus less weight. The rate at which you are accelerating downward subtracts from the pull of gravity, thus your weight is less. If you fall, say from a cliff or tall building you accelerate downward at exactly the acceleration of gravity so you're completely weightless.
What does an air bag do to the acceleration of the person as they land compared to hard ground and how does this change the net force on the person as they land compared to hard ground?
The airbag reduces the deceleration experienced on impact. In terms of acceleration, this means that the airbag has lowered the rate at which the downward acceleration decreases.If a falling person hits solid ground then their velocity goes from high to zero almost instantaneously. This means that the downward acceleration has changed very quickly. The airbag increases the time in which it takes the velocity to fall to zero. This is the same as saying it reduces the deceleration.Of course an airbag has the additional benefit of being soft relative to the ground, but simply considering acceleration/deceleration, reducing this lessens the harm done to the person. A high rate of acceleration/deceleration by itself can cause death/serious injury as a person's internal organs rupture due to the sudden collision with the other parts of the body (bones for instance). An airbag is helping by reducing the rate of change of the downward acceleration to a more survivable level. The force on the person is therefore lowered on "landing".
Rate of speed at which a human falls from the sky?
The initial acceleration will be about 9.8 meters per second squared (m/s2) and the acceleration gradually drops to zero due to air resistance. The terminal velocity varies greatly for a person curled up into a ball and a person with a parachute.
Who is responsible if an elevator falls and you are on it?
The person who owns the building and you are in the elevator they are responsible??
Who is the person who made the elevator?
Elisha Otis invented the elevator in 1853.
A 60 kg person stands on a scale in an elevator. (a) What does the scale read (in N) when the elevator is at rest N (b) What does it read when the elevator is climbing at a constant speed of 4.5 ms N?
We must use: (Force) = (Mass) x (Acceleration) Force = 400 N Acceleration = 9.8 m/(s^2) Mass = M 400 N = ( M ) x ( 9.8 m/(s^2)) After calculating, we find the mass of the man to be 40.82 kg.
What happens when you push the stop button on the elevator?
The elevator stops and a person talks to you
What do you call a person working in an elevator?
Elevator man/boy. The euphemism for the job is officer of vertical transportation.
The acceleration of gravity on the surface of a planet will effect a person or objects?
The acceleration affects the weight of the person and object
What is the analogy for steel beams are to crane as person is to?
Elevator!
A person jumps off a diving board 4.0m above the water's surface into a pool the person's downward motion stops 2.0m below the surface of the water estimate the avg. decleration of the person under wa?
so what you need to do is find the velocity that the person enters the water and then use the equation v sub final squared = v sub initial squared + 2*acceleration(final distance-initial distance). final velocity is zero, find the initial velocity yourself and use 2 as the final distance where the initial distance is 0, solve for acceleration. Easy way: the decelleration would have been twice that provided by gravity because the diver decellerated to zero in half the distance of the dive. The diver starts at zero and hits max velocity in 4 meters then goes from max velocity to zero in 2 meters. 2 x 9.81 m/s2 = ___
Definition of mass and definition of weight?
Mass: The measure of an object's resistance to acceleration (a change in its state of motion) when a force is applied.Weight: A body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
