A man is pulling a 120 lb wooden box by a rope with a force of...

A man is pulling a 120 lb wooden box by a rope with a force of 80 lb along a wooden floor. The rope is 45 degrees from the horizontal. The coefficient of of dynamic friction between wood to wood surfaces is Uk=0.45. If the box initially starts from rest, what will the box's (a) acceleration,and (b) velocity after 8 sec? (c) max power and (d) average power. Make sure to have FDB and kinetic diagrams, and unit base vectors.

Expert Solution

samet mamat answered 2 years ago

You are pulling a rope that is attached to a sled that your cousin is riding...

You are pulling a rope that is attached to a sled that your cousin is riding on. The rope that you are pulling on is at an angle of 30 degrees above the surface of the snow. Your cousin is holding a second rope that is attached to a second sled that is carrying firewood. The rope that your cousin is pulling is parallel to the surface of the snow. The mass of your cousin and her sled is 45...

A 61.0 kg box hangs from a rope. What is the tension in the rope if:...

A 61.0 kg box hangs from a rope. What is the tension in the rope if: a.) The box is at rest? - 598 N b.) The box moves up a steady 4.90 m/s ? c.) The box has vy = 5.40 m/s and is speeding up at 5.50 m/s2 ? The y axis points upward. d.) The box has vy = 5.40 m/s and is slowing down at 5.50 m/s2 ?

A 55.0 kg box hangs from a rope. What is the tension in the rope if:...

A 55.0 kg box hangs from a rope. What is the tension in the rope if: Part A The box is at rest? Express your answer with the appropriate units. Part B The box moves up a steady 4.90 m/s ? Express your answer with the appropriate units. Part C The box has vy = 4.60 m/s and is speeding up at 4.90 m/s2 ? The y axis points upward. Express your answer with the appropriate units. Part D The...

A person is pulling on a block with a force of 100N at an angle of...

A person is pulling on a block with a force of 100N at an angle of 30 degrees with the horizontal (+x direction). If the mass of the block is 10kg and the coefficient of friction is uk=0.2, and the block undergoes a displacement of 15 m in the +x direction, what is the net work done on the block? a.) -294 J b.) 294 J c.)1005 J d.)1299 J e.)1593 J

Muscle A has a force of 450 N and is pulling on a bone at an...

Muscle A has a force of 450 N and is pulling on a bone at an angle of 15 degrees. Muscle B has a force of 600 N and is pulling on the same bone at the same spot, but at an angle of 30 degrees. Muscle C has a force of 325 N and is pulling at the same spot with an angle of pull of 10 degrees. What is the amount of rotary force produced by Muscle A?...

1.) A box made of wood is sitting on a wooden floor. The box and contents...

1.) A box made of wood is sitting on a wooden floor. The box and contents has mass 40kg. The coefficient of static friction is 0.50 and kinetic friction is 0.30. A person begins to push the box horizontally by slowly increasing their force until it reaches 160N. Describe the state of motion (if any) of the box and the frictional force acting. 2.) The formula for friction is f=uN, for both static and dynamic friction. What factors that may...

A 45 kg wooden crate is being pushed across a wooden floor with a force of...

A 45 kg wooden crate is being pushed across a wooden floor with a force of 175 N. If, uk = 0.03. What is the acceleration of the crate?

A child is pulling a friend in a wagon. She exerts a force of 80 N...

A child is pulling a friend in a wagon. She exerts a force of 80 N on the wagon handle, which rises at an angle of 40° above the horizontal. The mass of her friend plus the wagon is 45 kg. Assuming there is no friction, find the acceleration of the wagon.

As a mechanical engineer, design a hydraulic circuit with pushing and pulling force using a lever....

As a mechanical engineer, design a hydraulic circuit with pushing and pulling force using a lever. Please consider a minimal usage of components in your design. Explain the operation based on directional control valve position. Use symbols in accordance to ISO 1219. A manufacturing machine supplier needs your help to design a hydraulic circuit for 2 cylinder output that operate in sequence, one after another. Please consider a minimal usage of components in your design. Explain the operation based on...

A lightweight rope is wrapped around a 100-lb drum, passes over a frictionless pulley, and is...

A lightweight rope is wrapped around a 100-lb drum, passes over a frictionless pulley, and is attached to a weight W (see figure). The coefficient of friction between the drum and the surfaces is 0.50. Determine the maximum amount of weight that can be supported by this arrangement.

Question