A 146.8 lbf prefabricated slab is hoisted by a rope. The rope pulls on the slab...
A 146.8 lbf prefabricated slab is hoisted by a rope. The rope pulls on the slab with a force of 846.5 N at an angle of 19.3° to the left of vertically upward. The only other force acting on the slab is the force of air resistance. The slab is moving at a constant velocity of 0.3 mph. What is the magnitude of the force of air resistance?
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A 146.8 lbf prefabricated slab is hoisted by a rope. The rope
pulls on the slab...
Jane is dragging a 1.2 lbf suitcase across the floor by tying a rope to it...
Jane is dragging a 1.2 lbf suitcase across the floor by tying a rope to it and applying a force at an angle of 7.4 degree above the floor. She found that it takes 1.6 N of force to keep it moving at a constant velocity. What is the coefficient of dynamic friction between the floor and the box? Andrew is moving a W=3.4 lbs box by pushing the box forward and down with a force of F=4.2 N. He...
A boy pulls a 5.0-kg sled with a rope that makes a 60.0° angle with respect...
A boy pulls a 5.0-kg sled with a rope that makes a 60.0° angle with respect to the horizontal surface of a frozen pond. The boy pulls on the rope with a force of 10.0 N, and the sled moves with constant velocity. What is the coefficient of friction between the sled and the ice? A) 0.09 B) 0.10 C) 0.18 D) 0.06 E) 0.24 The answer is C 0.18, I don't undersatnd why.
5) Little Bobby is pushing a cart and the cart starts to slow down, which free...
5) Little Bobby is pushing a cart and the cart starts to slow down, which free body diagram below is correct for the cart slowing down as Little Bobby continues to pushes. A) F FN F D) FN F applied F applied applied F applied 6) Bob applies a force with a magnitude of |F = 160 N to a box downward at an angle = 60° relative to the horizontal, the box has a weight of 196 N and...
help me about this pleasee 1. Determine the upward applied force, in lbf, required to accelerate...
help me about this pleasee
1. Determine the upward applied force, in lbf, required to accelerate a 2,04 kg model rocket vertically upward. with an acceleration of 3 g's. The only other significant force acting on the rocket is gravity, and I g9,8 m/s2. 2. Figure 2 shows an object whose mass is 5 lb attached to a rope wound around a pulley. The radius of the pulley is 3 in. If the mass falls at a constant velocity of...
Consider the block arrangement for the following situations: (a) Block moving upward at constant speed (b) Block moving...
Consider the block arrangement for the following situations: (a)
Block moving upward at constant speed (b) Block moving downward at
constant speed (c) Block moving upward, speed decreasing (d) Block
moving upward, speed increasing (e) Block stationary
it was like that
i dont understand the question. help.
Example 5.2.1 Sample Problem Block accelerating vertically This first figure shows a vertically moving block on the end of a cord. Example 5.2.1 Figure 1 This second figure gives the vertical velocity component...
A stone with mass m = 0.700 kg is thrown vertically upward into the air with...
A stone with mass m = 0.700 kg is thrown vertically upward into the air with an initial kinetic energy of 610 J. The drag force acting on the stone throughout its flight is constant, independent of the velocity of the stone, and has a magnitude of 0.600 N. What is the maximum height reached by the stone? What is the speed of the stone upon impact with the ground?
The helicopter in the drawing is moving horizontally to the right at a constant velocity
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 55300 N. The lift force L generated by the rotating blade makes an angle of 21.0° with respect to the vertical.(a) What is the magnitude of the lift force? N(b) Determine the magnitude of the air resistance R that opposes the motion. N
understanding newton's law 1. An object cannot remain at rest unless which of the following holds? a. The net force act...
understanding newton's law 1. An object cannot remain at rest unless which of the following holds? a. The net force acting on it is zero. b. The net force acting on it is constant and nonzero. c. There are no forces at all acting on it. d. There is only one force acting on it. which one is the answer? there can be more than one answer.... 2. If a block is moving to the left at a constant velocity,...
7) A 21-ton (42,000-lb) truck collides with an 2300-lb car and causes a lot of damage...
7) A 21-ton (42,000-lb) truck collides with an 2300-lb car and causes a lot of damage to the car. During the collision A) the force on the truck due to the collision is greater than the force on the car, and the truck experiences greater acceleration. B) the force on the truck due to the collision is greater than the force on the car, and the car experiences greater acceleration. C) the forces on the truck and car are equal,...
When an object falls in Earth's gravitational field (think of a skydiver jumping from an airplane or a marble falling in a tank of oil)
When an object falls in Earth's gravitational field (think of a skydiver jumping from an airplane or a marble falling in a tank of oil), it accelerates due to the force of gravity. If gravity were the only force acting on the object, then all objects-elephants and feathers alike would fall at the same rate. But gravity is not the only force present. Moving objects also experience resistance or friction from the surrounding medium; it would be air resistance for...
Jane is dragging a 1.2 lbf suitcase across the floor by tying a rope to it and applying a force at an angle of 7.4 degree above the floor. She found that it takes 1.6 N of force to keep it moving at a constant velocity. What is the coefficient of dynamic friction between the floor and the box? Andrew is moving a W=3.4 lbs box by pushing the box forward and down with a force of F=4.2 N. He...
5) Little Bobby is pushing a cart and the cart starts to slow down, which free body diagram below is correct for the cart slowing down as Little Bobby continues to pushes. A) F FN F D) FN F applied F applied applied F applied 6) Bob applies a force with a magnitude of |F = 160 N to a box downward at an angle = 60° relative to the horizontal, the box has a weight of 196 N and...
help me about this pleasee
1. Determine the upward applied force, in lbf, required to accelerate a 2,04 kg model rocket vertically upward. with an acceleration of 3 g's. The only other significant force acting on the rocket is gravity, and I g9,8 m/s2. 2. Figure 2 shows an object whose mass is 5 lb attached to a rope wound around a pulley. The radius of the pulley is 3 in. If the mass falls at a constant velocity of...
Consider the block arrangement for the following situations: (a)
Block moving upward at constant speed (b) Block moving downward at
constant speed (c) Block moving upward, speed decreasing (d) Block
moving upward, speed increasing (e) Block stationary
it was like that
i dont understand the question. help.
Example 5.2.1 Sample Problem Block accelerating vertically This first figure shows a vertically moving block on the end of a cord. Example 5.2.1 Figure 1 This second figure gives the vertical velocity component...
7) A 21-ton (42,000-lb) truck collides with an 2300-lb car and causes a lot of damage to the car. During the collision A) the force on the truck due to the collision is greater than the force on the car, and the truck experiences greater acceleration. B) the force on the truck due to the collision is greater than the force on the car, and the car experiences greater acceleration. C) the forces on the truck and car are equal,...
When an object falls in Earth's gravitational field (think of a skydiver jumping from an airplane or a marble falling in a tank of oil), it accelerates due to the force of gravity. If gravity were the only force acting on the object, then all objects-elephants and feathers alike would fall at the same rate. But gravity is not the only force present. Moving objects also experience resistance or friction from the surrounding medium; it would be air resistance for...
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