Homework Answers
51 - Option (a)
there are two forces acting on the elevator when the elevator is moving down,
1. the tension in the cable pulling up 2. gravity pulling down0.
due to this elevator is slowing down then it has a net acceleration upwards which means the upwards force must be greater than the weight due to gravity pulling downwards.
The tension is the cable is greater than the weight of the elevator
52 - A
As the bucket is moving with constant downward velocity the weight and tension acts downwards.
therefore The tension is the rope is equal to the weight of the elevator.
53 - C The push of box g against you
Add Answer to:
_________An elevator suspended by a vertical cable is moving downward but slowing down. The tension in...
(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...
2) Rita is in an elevator that is moving at a constant velocity downward. If the...
2) Rita is in an elevator that is moving at a constant velocity downward. If the elevator now experiences an acceleration so that it speeds up, the normal force Rita experiences A) becomes greater than her weight. B) remains equal to her weight. C) becomes less than her weight, but not equal to zero. D) becomes zero. E) cannot be determined without more information. 11) A rope connects object A (mass 4m) with object B (mass m). (Object A is...
You step into a high-speed elevator on the top floor of a tall building and push...
You step into a high-speed elevator on the top floor of a tall building and push the button for the first floor. The elevator accelerates downwards. How does the normal force N exerted on you by the floor of the elevator compare to your weight? Select one: O a. the normal force is equal to your weight O b. It depends on how fast you are moving O c. the normal force is greater than your weight O d. the...
An elevator starts from rest at the bottom of a building and is now moving steadily...
An elevator starts from rest at the bottom of a building and is now moving steadily upward (no longer speeding up). Which statement is correct about its motion now and why? A) The net force on the elevator is zero B) The net force on the elevator is greater than zero C) The net force on the elevator is negative, downward D) The net force is equal to the weight of the elevator
(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...
what is the magnitude fad of the downward force on section a?
To understand the concept of tension and the relationship
between tension and force. This problem introduces the concept of
tension. The example is a rope, oriented vertically, that is being
pulled from both ends. (Figure 1) Let Fu and Fd (with u for up and
d for down) represent the magnitude of the forces acting on the top
and bottom of the rope, respectively. Assume that the rope is
massless, so that its weight is negligible compared with the
tension....
help :( (diagrams 2,3,4 are included here ) QUESTION 7 A box is at rest on...
help :(
(diagrams 2,3,4 are included here )
QUESTION 7 A box is at rest on a horizontal, frictionless table. Horizontal force F1 points along the positive x-axis; when it is the only force acting on the box, the box accelerates at 6.75 m/s. Force F3 is also horizontal; it has magnitude 2.85F, and acts at an angle 22.6° to the direction of F1. If forces F1 and F3 act on the box at the same time, find the magnitude...
this example shows the uses of co-coordinate axes, my question is why is it that we...
this example shows the uses of co-coordinate axes,
my question is why is it that we can substitute T for w2 for
the second equation , won t it be wrong since we are using two
different sets of axes
does it have something to do with expressing newtons second
law in terms of magnittude?
can someone explain more about the uses of co-coordinate axes
and when is it not apprioriate not to use it?
5.2 Using Newton's Second Law:...
don a sled starts from rest at the top of a 15.0° slope. If the trip...
don a sled starts from rest at the top of a 15.0° slope. If the trip to the bottom takes 2 s, how long i A) 586 mB) 293 m C) 1130 m D) 147 m 2) Two children fighting over a toy pull on the toy in different directions. One child pulls to the north with a force of 5.3 N, and the other child pulls to the east with a force of 6.3 N. What is the magnitude...
1) An object is in static equilibrium. Which statement(s) about this object must always be true?...
1) An object is in static equilibrium. Which statement(s) about this object must always be true? A) The net force on the object is zero. B) The acceleration of the object is zero. C) No forces are acting on the object. D) Both A and B E) All of these 2) A large fast-moving truck collides with a small stationary car. During the collision A) the car and the truck have the same magnitude of acceleration. B) the magnitude of...
2) Rita is in an elevator that is moving at a constant velocity downward. If the elevator now experiences an acceleration so that it speeds up, the normal force Rita experiences A) becomes greater than her weight. B) remains equal to her weight. C) becomes less than her weight, but not equal to zero. D) becomes zero. E) cannot be determined without more information. 11) A rope connects object A (mass 4m) with object B (mass m). (Object A is...
You step into a high-speed elevator on the top floor of a tall building and push the button for the first floor. The elevator accelerates downwards. How does the normal force N exerted on you by the floor of the elevator compare to your weight? Select one: O a. the normal force is equal to your weight O b. It depends on how fast you are moving O c. the normal force is greater than your weight O d. the...
To understand the concept of tension and the relationship
between tension and force. This problem introduces the concept of
tension. The example is a rope, oriented vertically, that is being
pulled from both ends. (Figure 1) Let Fu and Fd (with u for up and
d for down) represent the magnitude of the forces acting on the top
and bottom of the rope, respectively. Assume that the rope is
massless, so that its weight is negligible compared with the
tension....
help :(
(diagrams 2,3,4 are included here )
QUESTION 7 A box is at rest on a horizontal, frictionless table. Horizontal force F1 points along the positive x-axis; when it is the only force acting on the box, the box accelerates at 6.75 m/s. Force F3 is also horizontal; it has magnitude 2.85F, and acts at an angle 22.6° to the direction of F1. If forces F1 and F3 act on the box at the same time, find the magnitude...
this example shows the uses of co-coordinate axes,
my question is why is it that we can substitute T for w2 for
the second equation , won t it be wrong since we are using two
different sets of axes
does it have something to do with expressing newtons second
law in terms of magnittude?
can someone explain more about the uses of co-coordinate axes
and when is it not apprioriate not to use it?
5.2 Using Newton's Second Law:...
don a sled starts from rest at the top of a 15.0° slope. If the trip to the bottom takes 2 s, how long i A) 586 mB) 293 m C) 1130 m D) 147 m 2) Two children fighting over a toy pull on the toy in different directions. One child pulls to the north with a force of 5.3 N, and the other child pulls to the east with a force of 6.3 N. What is the magnitude...
1) An object is in static equilibrium. Which statement(s) about this object must always be true? A) The net force on the object is zero. B) The acceleration of the object is zero. C) No forces are acting on the object. D) Both A and B E) All of these 2) A large fast-moving truck collides with a small stationary car. During the collision A) the car and the truck have the same magnitude of acceleration. B) the magnitude of...
Most questions answered within 3 hours.
-
Two identical flutes can play middle C (262 Hz) at 20◦C. How
many beats per second...
asked 10 minutes ago -
For the purposes of this assignment, you are to choose an
adaptive trait common to more...
asked 2 minutes ago -
Potassium phosphate and calcium chloride react in a double
replacement reaction. To produce 1.0 moles of...
asked 5 minutes ago -
Sparky, Co. purchased land as a factory site for $600,000.
Sparky paid $42,000 to tear down...
asked 19 minutes ago -
A Chi-square distribution with 14 degrees of freedom is a
correct model for
Question 8 options:...
asked 49 minutes ago -
In a group of 45 mice, there are 10 that have a certain genetic
character. suppose...
asked 30 minutes ago -
Topic: Hydrogenic Atoms
The wavefunction of one of the d orbitals is proportional to sin
θ...
asked 30 minutes ago -
6. Suppose that the Bank of Canada conducts an open market
purchase of $2000 from a...
asked 45 minutes ago -
A) Suppose U=X∙Y3. Find X* and Y*.
B) Suppose U=X3∙Y. Find X* and Y*.
C) Suppose...
asked 54 minutes ago -
The only quantities of good 1 that Barbara can buy are 1 unit or
zero units....
asked 43 minutes ago -
c. Node Admittance matrix and its use in different calculations
of power transmission system. Display the...
asked 51 minutes ago -
Try to get the code down to less than 40 lines. (PYTHON)
import random
fave_number =...
asked 51 minutes ago