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An elevator is being lifted up an elevator shaft at a constant speed by a steel...
An elevator is pulled upward so it moves with increasing upward speed?the force exerted by the...
An elevator is pulled upward so it moves with increasing upward
speed?the force exerted by the cable on the elevator is constant
and greater than the downward gravitational force exerted by Earth.
When the elevator is moving up medium-fast, the force exerted by
the cable on the elevator changes abruptly to just balance the
downward gravitational force of Earth?the sum of the forces that
the cable and Earth exert on the elevator is now zero.
please explain, thanks An elevator is being lifted at a constant Motor speed by a steel...
please explain, thanks
An elevator is being lifted at a constant Motor speed by a steel cable attached to an electric motor. Which statement is correct? Cable A. The cable does positive work on the elevator, and the elevator does positive Elevator work on the cable. B. The cable does positive work on the elevator, and the elevator does negative work on the cable. C. The cable does negative work on the elevator, and the elevator does positive work on...
(a) An elevator of mass m moving upward has two forces acting on it: the upward...
(a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is accelerating upward, which is greater, T or w? Tw Both forces are equal. (b) When the elevator is moving at a constant velocity upward, which is greater, T or w? Tw Both forces are equal. (c) When the elevator is moving upward, but the acceleration is downward, which is...
You are conducting an experiment inside an elevator that can move in a vertical shaft. A...
You are conducting an experiment inside an elevator that can move in a vertical shaft. A load is hung vertically from the ceiling on a string. The tension in the string is measured to be exactly equal to the force due to gravity on the load. No other forces are acting on the load. Which of the following statements about the elevator are correct? Check all that apply. The elevator is an inertial frame of reference. The elevator is not...
(a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the d...
(a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is accelerating upward, which is greater, T or w? T w Both forces are equal. (b) When the elevator is moving at a constant velocity upward, which is greater, T or w? T w Both forces are equal. (c) When the elevator is moving upward, but the acceleration...
Suppose a 1350-kg elevator car is lifted a distance 41 m by its cable at a...
Suppose a 1350-kg elevator car is lifted a distance 41 m by its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 1575 N. Calculate the work done on the elevator by its cable, in joules. Calculate the work done by the gravitational force on the elevator, in joules, during this process. Calculate the total work done on the elevator, in joules.
You are in your favorite elevator, coming to a stop as you go from the ground...
You are in your favorite elevator, coming to a stop as you go from the ground floor to the 4th floor. a) What forces are acting on you as you are coming to a stop in the elevator? Normal force upward and Force of gravity upward Normal force downward and Force of gravity upward Normal force downward and Force of gravity downward Normal force upward and Force of gravity downward Just the Force of gravity downward b) As you are...
a) A box in an upward moving elevator is being pushed across the floor with a...
a) A box in an upward moving elevator is being pushed across the floor with a constant force. 1) Friction is doing positive work on the box. True or False 2) The pushing force is doing negative work on the box. True or False 3) The normal force on the box is doing positive work on the box. True or False 4) If there is net positive work on the box parallel to the floor, the kinetic energy of the...
An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed....
An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed. What is the magnitude of the tension in the string? The magnitude of the tension in the string is equal to the magnitude of the weight of the object. The magnitude of the tension in the string is less than the magnitude of the weight of the object. The tension in the string cannot be determined without knowing...
There’s two boxes of equal mass: one pulled up by a rope at constant speed, and...
There’s two boxes of equal mass: one pulled up by a rope at constant speed, and another pulled up a ramp at a constant speed. They’re pulled up to the same height and there’s no friction on the ramp. Which statement is true? A) the magnitudes of force of tension in ropes are equal b) the work done by tension of rope in system 1 (the one being pulled up) is smaller than system 2 (the ramp one) C) the...
An elevator is pulled upward so it moves with increasing upward
speed?the force exerted by the cable on the elevator is constant
and greater than the downward gravitational force exerted by Earth.
When the elevator is moving up medium-fast, the force exerted by
the cable on the elevator changes abruptly to just balance the
downward gravitational force of Earth?the sum of the forces that
the cable and Earth exert on the elevator is now zero.
please explain, thanks
An elevator is being lifted at a constant Motor speed by a steel cable attached to an electric motor. Which statement is correct? Cable A. The cable does positive work on the elevator, and the elevator does positive Elevator work on the cable. B. The cable does positive work on the elevator, and the elevator does negative work on the cable. C. The cable does negative work on the elevator, and the elevator does positive work on...
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