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An elevator with a person in it is being pulled upwards by a massive cable. Identify...
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.
A box of mass M sits on the oor of an elevator at rest. Gravity (which...
A box of mass M sits on the oor of an elevator at rest. Gravity (which has a strength set by the local acceleration due to gravity g) pulls the box and the oor pushes the box. The net or total force on the box is zero. What is the force on the box from the oor? Give both the magnitude and the direction. Now imagine that the elevator is accelerating upwards at acceleration a. Now the two forces on...
QUESTION 1 A crate at rest resting on a floor: Normal force direction will be: along...
QUESTION 1 A crate at rest resting on a floor: Normal force direction will be: along the angle of the ramp with respect to the horizontal towards the center of earth parallel to the surface of the ramp perpendicular to the surface of the ramp 1 points QUESTION 2 A box is at rest on a wooden surface. The frictional force direction in this case will be: Opposite to the direction of the applied force perpendicular to the surface...
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...
The figure below shows a block with mass m = 5.3 kg pulled up a ramp...
The figure below shows a block with mass m = 5.3 kg pulled up a ramp inclined at an angle of 6 = 28° with a force of magnitude F = 33 N parallel to the ramp. m (a) If there is no friction between the block and the ramp, what is the magnitude of the block's acceleration (in m/s2)? 1.485 Draw a free-body diagram. What forces act on the block? Let the x-axis be parallel to the incline. What...
(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...
3. A block is on a frictionless table, on earth. The block accelerates at 3.0 m/...
3. A block is on a frictionless table, on earth. The block accelerates at 3.0 m/ when a 20 N horizontal force is applied to it. The block and table are set up on the Moon where the acceleration due to gravity is 1.62 m/s2. The weight of the block on the Moon is closest to 4. As shown in the figure, a 10-kg block on a perfectly smooth horizontal table is connected by a horizontal string to a 63-kg...
A delivery person carries a stack of three boxes labeled 1, 2, and 3, with box...
A delivery person carries a stack of three boxes labeled 1, 2, and 3, with box 3 on the bottom of the stack and box 1 on the top. The masses of boxes 1, 2, and 3 are ?1=1.05 kg, ?2=2.44 kg, and ?3=6.80 kg, respectively. The delivery person places the stack of boxes on an elevator floor, which then accelerates upward with a magnitude of ?=0.80 m/s2. Let ?=9.81 m/s2 denote the acceleration due to gravity, and let the...
Three Forces Three forces: F1 = 3 N, F2 = 9 N, and F3 =5 N...
Three Forces Three forces: F1 = 3 N, F2 = 9 N, and F3 =5 N act on a block of mass 3 kg. Calculate the magnitude of the block's acceleration when... 1) all three forces pull in the same direction: 5.7 m/s2 Submit Your submissions: 5.7 Computed value: 5.7 Feedback: Correct! Submitted: Friday, February 14 at 12:03 AM 2) forces F, and F2 pull in the same direction and force F3 pulls in the opposite direction: a = 2.3...
im A rope at an angle θ with the horizontal is pulled with a force UF....
im A rope at an angle θ with the horizontal is pulled with a force UF. It pulls, in turn, two blocks, the bottom with mass M and the top with mass m. The coefficients of friction are p, between the top and bottom block (assume that they do not slide for the given force ) and pu between the bottom block and the table. Remember to show (and possibly evaluate) all forces acting on both blocks, including internal forces...
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.
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...
The figure below shows a block with mass m = 5.3 kg pulled up a ramp inclined at an angle of 6 = 28° with a force of magnitude F = 33 N parallel to the ramp. m (a) If there is no friction between the block and the ramp, what is the magnitude of the block's acceleration (in m/s2)? 1.485 Draw a free-body diagram. What forces act on the block? Let the x-axis be parallel to the incline. What...
Three Forces Three forces: F1 = 3 N, F2 = 9 N, and F3 =5 N act on a block of mass 3 kg. Calculate the magnitude of the block's acceleration when... 1) all three forces pull in the same direction: 5.7 m/s2 Submit Your submissions: 5.7 Computed value: 5.7 Feedback: Correct! Submitted: Friday, February 14 at 12:03 AM 2) forces F, and F2 pull in the same direction and force F3 pulls in the opposite direction: a = 2.3...
im A rope at an angle θ with the horizontal is pulled with a force UF. It pulls, in turn, two blocks, the bottom with mass M and the top with mass m. The coefficients of friction are p, between the top and bottom block (assume that they do not slide for the given force ) and pu between the bottom block and the table. Remember to show (and possibly evaluate) all forces acting on both blocks, including internal forces...
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