When Joe is suspended at rest by holding a rope with one hand and the side...
When Joe is suspended at rest by holding a rope with one hand and the side of his cage with the other, what is the vector sum of forces acting on him?
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When Joe is suspended at rest by holding a rope with one hand
and the side...
7. Joe, a pole-vaulter, is holding a vaulting pole parallel to the ground. The pole is...
7. Joe, a pole-vaulter, is holding a vaulting pole parallel to the ground. The pole is 5 m long. Joe grips the pole with his right hand 10 cm from the top end of the pole and with his left hand 1 m from the top end of the pole. Although the pole is light (its mass is only 2.5 kg), the forces that Joe must exert on the pole to maintain it in this position are large. How large...
block is suspended by a rope from the ceiling of an elevator that 21. A 5...
block is suspended by a rope from the ceiling of an elevator that 21. A 5 kg sus accelerates downw ard at 3,0 m/s'. The tension force of the rope on the block is: A) 15 N, up B) 34 N, up C) 34 N, down D) 64 N, up E) 64 N, down 22. A 90 kg man stands in an elevator that has a downward acceleration of 14 m/s. The force exerted by him on the floor is...
2. Bill is holding a 12 kg barbell in his hand. His upper arm is perpendicular...
2. Bill is holding a 12 kg barbell in his hand. His upper arm is perpendicular to the ground, and his elbow is flexed to produce a 40º angle at the elbow joint. His forearm has a mass of 12 kg. The distance from the elbow joint to the weight in his hand is 35 cm. The center of mass (COM) of his forearm is located 14 cm from the elbow joint. Draw a free body diagram of this scenario....
Force vectors (a) (10 points) Here a stone is suspended at rest by a string. The...
Force vectors (a) (10 points) Here a stone is suspended at rest by a string. The weight is drawn as a (white) vector arrow. Draw a vector for the missing force acting on the stone. As the origin of the vector, choose the same point from which the weight is drawn. Hint: ask what the net force on the stone must be. NOTE: the rules for where to draw force arrows are very flexible. Think of arrows as thrusters, and...
A load of bricks with mass = 15.0 hangs from one end of a rope that...
A load of bricks with mass = 15.0
hangs from one end of a rope that passes over a small, frictionless
pulley. A counterweight of mass = 27.6 is suspended from the other
end of the rope, as shown in the figure. The system is released
from rest.
1)What is the magnitude of the upward acceleration of the load of
bricks?
2)What is the tension in the rope while the load is moving?
When three forces act on an object which is at rest, it remains at rest. What...
When three forces act on an object which is at rest, it remains at rest. What would happen if one of the three forces stopped acting on the object?
You are in an temporary elevator when the rope holding it breaks. Fortunately, there is a large b...
You are in an temporary elevator when the rope holding it breaks. Fortunately, there is a large bumper, essentially a spring, at the bottom of the elevator shaft in case of just such a catastrophe. Your initial height above the top of the (uncompressed) spring is 1.07 m. The mass of the elevator (plus you) is 892 kg. The spring constant of the spring is 3.47 x 10 N/m. How far below the position of the top of the uncompressed...
A 12 kg load hangs from one end of a rope that passes over a small...
A 12 kg load hangs from one end of a rope that passes over a small frictionless pulley. A 15 kg counterweight is suspended from the other end of the rope. The system is released from rest. a) Calculate the tension force in the rope. b) What distance does the 12 kg move in the first 3 seconds? c) What is the velocity of 15 kg mass at the end of 5 seconds?
You are at work and Joe, one of your co-workers, begins acting strange. You all think...
You are at work and Joe, one of your co-workers, begins acting strange. You all think he is drunk. Security comes in and talks to your co-worker, sits him down, and gives him some hard candy from Joe's desk. Someone notices a medical alert bracelet on Joe but can only see the word TYPE followed by a number on it from where you are standing. Why did the officer give candy and was it a correct action? A. Joe is...
Suppose Arturo is standing on a spring bathroom scale in an elevator, which is at rest,...
Suppose Arturo is standing on a spring bathroom scale in an elevator, which is at rest, on the 15th floor. What is his acceleration? What forces are acting on him? What is the reading (in Newtons) on the bathroom scale if he has a mass of 150 kg? (Draw it out and Label it) Now imagine disaster - the rope holding the elevator snaps, there are no safety features, and the elevator plunges down the shaft in free fall. Herrera...
7. Joe, a pole-vaulter, is holding a vaulting pole parallel to the ground. The pole is 5 m long. Joe grips the pole with his right hand 10 cm from the top end of the pole and with his left hand 1 m from the top end of the pole. Although the pole is light (its mass is only 2.5 kg), the forces that Joe must exert on the pole to maintain it in this position are large. How large...
block is suspended by a rope from the ceiling of an elevator that 21. A 5 kg sus accelerates downw ard at 3,0 m/s'. The tension force of the rope on the block is: A) 15 N, up B) 34 N, up C) 34 N, down D) 64 N, up E) 64 N, down 22. A 90 kg man stands in an elevator that has a downward acceleration of 14 m/s. The force exerted by him on the floor is...
Force vectors (a) (10 points) Here a stone is suspended at rest by a string. The weight is drawn as a (white) vector arrow. Draw a vector for the missing force acting on the stone. As the origin of the vector, choose the same point from which the weight is drawn. Hint: ask what the net force on the stone must be. NOTE: the rules for where to draw force arrows are very flexible. Think of arrows as thrusters, and...
A load of bricks with mass = 15.0
hangs from one end of a rope that passes over a small, frictionless
pulley. A counterweight of mass = 27.6 is suspended from the other
end of the rope, as shown in the figure. The system is released
from rest.
1)What is the magnitude of the upward acceleration of the load of
bricks?
2)What is the tension in the rope while the load is moving?
You are in an temporary elevator when the rope holding it breaks. Fortunately, there is a large bumper, essentially a spring, at the bottom of the elevator shaft in case of just such a catastrophe. Your initial height above the top of the (uncompressed) spring is 1.07 m. The mass of the elevator (plus you) is 892 kg. The spring constant of the spring is 3.47 x 10 N/m. How far below the position of the top of the uncompressed...
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