Homework Answers
Question 6 5 pts The girl shown below has a mass of 15kg and sits at...
Question 6 5 pts The girl shown below has a mass of 15kg and sits at r= 5m from the platform's center. If the coefficient of static friction between the girl and the platform is = 0.2. calculate the girl's max speed (in m/s) before she begins to slip. You may assume the platform increases its speed slowly so that the girl's tangential component of acceleration may be neglected. Z 5 m
The crate has a mass of 80 kg and is being towed by a chain which...
The crate has a mass of 80 kg and is being towed by a chain which is always directed at 20° from the horizontal as shown. If the magnitude of P is increased until the crate begins to slide, determine the crate's initial acceleration if the coefficient of static friction is p0.5 and the coefficient of kinetic friction is px 0.3. Select one ON a. 353 m/s2 ON b. None CO 36 m/s2 3 d. 1.66 m/s2 Me33.3 m/s2
A man of mass 80 kg is standing stationary in the middle of a train carriage....
A man of mass 80 kg is standing stationary in the middle of a train carriage. The train is moving horizontally (towards the right) with a constant speed of 20 m/s, and the carriage is L = 20 m long. Suddenly, the train starts to accelerate uniformly with a = 2 m/s2 horizontally a) Is the reference frame of the train now an inertial frame? Design an experiment that allows you to find out. b) Draw a free-body diagram of...
Problem , (20%) A 0.9 kg block of negligible size is located a d-0.8m from the...
Problem , (20%) A 0.9 kg block of negligible size is located a d-0.8m from the center of a rotating platlorm with an outer radius of D-2m, as shown in the picture to the right The platforn starts rotating from rest, and its angular speed increases at a constant rate of 1.2 rad's The coefficient of static friction between the block and the platform is Ah-02. Draw two clear, complete, and appropriate free body diagrams of the situation in the...
e susJrom rest at the top of the well and falls for before hitting the water, how far does it fall? Moment of inertia of cylinder 1-% MR 2. A ladder is leant against the wall. The coefficient of...
e susJrom rest at the top of the well and falls for before hitting the water, how far does it fall? Moment of inertia of cylinder 1-% MR 2. A ladder is leant against the wall. The coefficient of the static friction p. between the ladder and the wall is 0.3 and the coefficient of the static friction g, between the ladder and the floor is 0.4. The center of mass of the ladder is in the middle of it...
4. A 3.8 kg cat is standing on a rotating platform of radius of 1.5 m...
4. A 3.8 kg cat is standing on a rotating platform of radius of 1.5 m from the center of the platform. Then the operator turns on the ride and brings it up to a rotating rate of one revolution every 4.0 S. a) Identify the net force on the cat. b) Calculate the net force acting on the cat. c) The cat begins to walk radially outward. He realizes that he begins to slide when he reaches a radius...
1. A 3-kg solid solid ball sits on a long platform of mass 12-kg and length...
1. A 3-kg solid solid ball sits on a long platform of mass 12-kg and length 18 m. There is friction between the solid ball and the platform (-0.3 and u- 0.4). There is kinetic friction of Ju-0.5 between the platform and the ground. 1-1). You come upon this system moving at 10m/s with a horizontal force F- 75N is acting on it. a). What is the acceleration of the platform relative to the ground? b). What is the acceleration...
A uniform cylinder of mass m = 33 kg and radius 20 cm sits at rest...
A uniform cylinder of mass m = 33 kg and radius 20 cm sits at
rest on a horizontal surface. It is held by a rope at point B which
is connected to the vertical surface as shown. The static
coefficient of friction at the contact point is 0.45.
If the force F is too large the cylinder will start to slip at
the contact point. What is the maximum magnitude of force F in N
before the cylinder slips?...
Why is the friction equal to the force? A crate of mass 180 kg sits on...
Why is the friction equal to the force?
A crate of mass 180 kg sits on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.36. You push the crate with a horizontal force of 600 N. What is the magnitude of the frictional force on the crate by the floor in this situation? [Use g = 9.81 m/s2] Incorrect 635.69 N. Incorrect 706.32 N Incorrect...
Problem 1: A force P is applied to a block A of mass m= 14 kg...
Problem 1: A force P is applied to a block A of mass m= 14 kg as shown. The block sits on an inclined surface with 0= 30° and a coefficient of static friction = 0.4. | 8=9.81 m/s What is the maximum force P that will start A moving down the incline?
Question 6 5 pts The girl shown below has a mass of 15kg and sits at r= 5m from the platform's center. If the coefficient of static friction between the girl and the platform is = 0.2. calculate the girl's max speed (in m/s) before she begins to slip. You may assume the platform increases its speed slowly so that the girl's tangential component of acceleration may be neglected. Z 5 m
The crate has a mass of 80 kg and is being towed by a chain which is always directed at 20° from the horizontal as shown. If the magnitude of P is increased until the crate begins to slide, determine the crate's initial acceleration if the coefficient of static friction is p0.5 and the coefficient of kinetic friction is px 0.3. Select one ON a. 353 m/s2 ON b. None CO 36 m/s2 3 d. 1.66 m/s2 Me33.3 m/s2
Problem , (20%) A 0.9 kg block of negligible size is located a d-0.8m from the center of a rotating platlorm with an outer radius of D-2m, as shown in the picture to the right The platforn starts rotating from rest, and its angular speed increases at a constant rate of 1.2 rad's The coefficient of static friction between the block and the platform is Ah-02. Draw two clear, complete, and appropriate free body diagrams of the situation in the...
e susJrom rest at the top of the well and falls for before hitting the water, how far does it fall? Moment of inertia of cylinder 1-% MR 2. A ladder is leant against the wall. The coefficient of the static friction p. between the ladder and the wall is 0.3 and the coefficient of the static friction g, between the ladder and the floor is 0.4. The center of mass of the ladder is in the middle of it...
4. A 3.8 kg cat is standing on a rotating platform of radius of 1.5 m from the center of the platform. Then the operator turns on the ride and brings it up to a rotating rate of one revolution every 4.0 S. a) Identify the net force on the cat. b) Calculate the net force acting on the cat. c) The cat begins to walk radially outward. He realizes that he begins to slide when he reaches a radius...
1. A 3-kg solid solid ball sits on a long platform of mass 12-kg and length 18 m. There is friction between the solid ball and the platform (-0.3 and u- 0.4). There is kinetic friction of Ju-0.5 between the platform and the ground. 1-1). You come upon this system moving at 10m/s with a horizontal force F- 75N is acting on it. a). What is the acceleration of the platform relative to the ground? b). What is the acceleration...
A uniform cylinder of mass m = 33 kg and radius 20 cm sits at
rest on a horizontal surface. It is held by a rope at point B which
is connected to the vertical surface as shown. The static
coefficient of friction at the contact point is 0.45.
If the force F is too large the cylinder will start to slip at
the contact point. What is the maximum magnitude of force F in N
before the cylinder slips?...
Why is the friction equal to the force?
A crate of mass 180 kg sits on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.36. You push the crate with a horizontal force of 600 N. What is the magnitude of the frictional force on the crate by the floor in this situation? [Use g = 9.81 m/s2] Incorrect 635.69 N. Incorrect 706.32 N Incorrect...
Problem 1: A force P is applied to a block A of mass m= 14 kg as shown. The block sits on an inclined surface with 0= 30° and a coefficient of static friction = 0.4. | 8=9.81 m/s What is the maximum force P that will start A moving down the incline?
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