8. Draw freebody diagrams if needed to solve both 8a and 8b. a. A 723 kg...
8. Draw freebody diagrams if needed to solve both 8a and 8b.
a. A 723 kg elevator car is supported by two cables. Assume that the tension in each cable is the same. If the elevator is accelerating downward at 0.298 m/s2, find the magnitude of the tension in each cable, in N.
8b. A heavy rope of mass 6.44 kg is tied around a box of mass 10.7 sitting at rest on a horizontal, frictionless surface. If the rope is pulled horizontally with a force of 55.8 N, find the magnitude of the acceleration of the box, in m/s2.
HINT: This is different from the problem where the rope is massless! Assume the rope remains completely horizontal.
Homework Answers
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8. Draw freebody diagrams if needed to solve both 8a and 8b.
a. A 723 kg...
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...
A) A massless rope is tied to a 1.82 kg box sitting on a rough, horizontal...
A) A massless rope is tied to a 1.82 kg box sitting on a rough, horizontal surface. The rope is pulled with constant force F acting upward at an angle 15.8o to the horizontal. The coefficient of kinetic friction between the box and the surface is 0.217, and the box slides at constant speed along the table for a distance of 84.4 m. Find the total work done by F, in J. B)Josh, mass 143 kg, is racing against his...
Problem #4 A 10 kg box resting on a horizontal, frictionless surface is attached to a...
Problem #4 A 10 kg box resting on a horizontal, frictionless surface is attached to a 4 kg block by a thin light rope that passes over a frictionless pulley. The pulley has a shape of a uniform solid disk of mass 4.5 kg and a radius of 0.55 m. After the system is released 10 kg box moves to the right, 4 kg block moves down and the pulley rotates clockwise. Find: (a) the magnitude of the tension (in...
Problem #1 m1 m2 Two blocks mı = 4 kg and m2 = 9 kg are...
Problem #1 m1 m2 Two blocks mı = 4 kg and m2 = 9 kg are initially arranged as shown in the figure. They are tied to a massless rope going around the pulley. The pulley has a form of a cylinder with a mass of M = 8 kg and radius of R = 40 cm. Both the incline and the horizontal surface have a coefficient of kinetic friction ulk = 0.15. The incline is at the angle o...
Problem #1 mi m2 Two blocks mı = 4 kg and m2 = 9 kg are...
Problem #1 mi m2 Two blocks mı = 4 kg and m2 = 9 kg are initially arranged as shown in the figure. They are tied to a massless rope going around the pulley. The pulley has a form of a cylinder with a mass of M = 8 kg and radius of R = 40 cm. Both the incline and the horizontal surface have a coefficient of kinetic friction ulk = 0.15. The incline is at the angle 0...
#8 Mechanical Equilibrium: suspended blocks A 10.4 kg mass is suspended from the ceiling with a...
#8 Mechanical Equilibrium: suspended blocks A 10.4 kg mass is suspended from the ceiling with a cable of negligible mass. A 12.5 kg mass is attached (and suspended below) the 10.4 kg mass with a cable, also of negligible mass. What are the tensions, respectively, connecting the 10.4 kg mass to the ceiling (cable 1) and the cable connecting the 12.5 kg mass to the 10.4 kg mass (cable 2) O A. cable 1: 102 N; cable 2: 123 N...
1.A block of mass m = 5.00 kg is pulled along a horizontal frictionless floor by...
1.A block of mass m = 5.00 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of magnitude F = 12.0 N at an angle θ = 25o . (a) Draw the free body diagram of the block. (b) Find the normal force. 2.Two crates are at rest on frictionless horizontal surface. Both crates are connected by a light rope. A woman wearing golf shoes (so she can get traction on the ice) pulls...
m1 A block with mass my = 9.4 kg is on an incline with an angle...
m1 A block with mass my = 9.4 kg is on an incline with an angle 6 = 33 with respect to the horizontal. For the first question there is no friction between the incline and the block. 1) When there is no friction, what is the magnitude of the acceleration of the block? m/s2 Submit 2) Now with friction, the acceleration is measured to be only a = 3.63 m/s2. What is the coefficient of kinetic friction between the...
please both. thanks. Capture10.PNG 'Two masses mi = 10 kg and m2-8 kg are attached with...
please both. thanks.
Capture10.PNG 'Two masses mi = 10 kg and m2-8 kg are attached with a massless string and are arranged as in the figure bellow. m2 is on a horizontal table with coefficient of kinetic friction / = 0.25. Thea sydtem is cceleration of the two mass 5 a) a 2.82 m/s b) a 2.55 m/s2. c) a= 4.33 ml/s2 d) a = 1.80m/s 2. e) a = 3.25 m/s". Mk 20.2S noa,T tr Capture11.PNG sIn question 14)...
A block with mass m1 = 8.5 kg is on an incline with an angle θ...
A block with mass m1 = 8.5 kg is on an incline with an angle θ = 25° with respect to the horizontal. For the first question there is no friction between the incline and the block. 1)When there is no friction, what is the magnitude of the acceleration of the block? 2)Now with friction, the acceleration is measured to be only a = 2.74 m/s2. What is the coefficient of kinetic friction between the incline and the block? 3)...
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...
Problem #4 A 10 kg box resting on a horizontal, frictionless surface is attached to a 4 kg block by a thin light rope that passes over a frictionless pulley. The pulley has a shape of a uniform solid disk of mass 4.5 kg and a radius of 0.55 m. After the system is released 10 kg box moves to the right, 4 kg block moves down and the pulley rotates clockwise. Find: (a) the magnitude of the tension (in...
Problem #1 m1 m2 Two blocks mı = 4 kg and m2 = 9 kg are initially arranged as shown in the figure. They are tied to a massless rope going around the pulley. The pulley has a form of a cylinder with a mass of M = 8 kg and radius of R = 40 cm. Both the incline and the horizontal surface have a coefficient of kinetic friction ulk = 0.15. The incline is at the angle o...
Problem #1 mi m2 Two blocks mı = 4 kg and m2 = 9 kg are initially arranged as shown in the figure. They are tied to a massless rope going around the pulley. The pulley has a form of a cylinder with a mass of M = 8 kg and radius of R = 40 cm. Both the incline and the horizontal surface have a coefficient of kinetic friction ulk = 0.15. The incline is at the angle 0...
#8 Mechanical Equilibrium: suspended blocks A 10.4 kg mass is suspended from the ceiling with a cable of negligible mass. A 12.5 kg mass is attached (and suspended below) the 10.4 kg mass with a cable, also of negligible mass. What are the tensions, respectively, connecting the 10.4 kg mass to the ceiling (cable 1) and the cable connecting the 12.5 kg mass to the 10.4 kg mass (cable 2) O A. cable 1: 102 N; cable 2: 123 N...
m1 A block with mass my = 9.4 kg is on an incline with an angle 6 = 33 with respect to the horizontal. For the first question there is no friction between the incline and the block. 1) When there is no friction, what is the magnitude of the acceleration of the block? m/s2 Submit 2) Now with friction, the acceleration is measured to be only a = 3.63 m/s2. What is the coefficient of kinetic friction between the...
please both. thanks.
Capture10.PNG 'Two masses mi = 10 kg and m2-8 kg are attached with a massless string and are arranged as in the figure bellow. m2 is on a horizontal table with coefficient of kinetic friction / = 0.25. Thea sydtem is cceleration of the two mass 5 a) a 2.82 m/s b) a 2.55 m/s2. c) a= 4.33 ml/s2 d) a = 1.80m/s 2. e) a = 3.25 m/s". Mk 20.2S noa,T tr Capture11.PNG sIn question 14)...
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