A 7.80-g bullet moving at 575 m/s penetrates a tree trunk to a depth of 5.50 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. (b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.

Q: A 1000N block was pushed by a force P of 1500N up an incline upward to the right at a slope of 3…

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Q: An escalator is 30.0 meters long and slants at 30.0° relative to the horizontal.  If it moves at…

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Q: A block of wood is compressed 2.00 nm when inward forces of magnitude 141 N are applied to it on two…

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Q: A 23.5 kg sled is pulled 14.3 m along a flat section of snow by a force of 70.8 N [23.0° above…

A:

Q: our students of average mass 80 kg each are raised by the elevator in the ESB building, with the…

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Q: If a 50 kg object initially at rest is displaced 25 m by a constant net force of 600 N in the…

A: Work done is equal to change in kinetic energy of the body . Work done = (Force)*(displacement)…

Q: A 907 kg elevator carries passengers with combined mass of 542 kg as it ascends at constant speed of…

A:

Q: A 5.0-kg box has an acceleration of 2.0 m/s2 when it is pulled by a horizontal force across a…

A: Given: Mass of the box = 5 Kg Acceleration of the box = 2 m/s2 Coefficient of the kinetic friction =…

Q: A car of mass 1200 kg travels along a horizontal road at a speed of 10 ms'. At the time it begins to…

A: GIVEN THAT    m =  1200 kg      speed = 10 m/s      acceleration = 0.2 m/s2    resistive force = 160…

Q: A box of mass 11 kg is released at point A and slides to the bottom of a rough incline. The box then…

A: given: m=11kg∆x=17.5cm = 0.175 mk=3500 N/mh=2.0mθ=30°

Q: A tractor tows a plane from its airport gate, doing 8.8 MJ of work. The link from the plane to the…

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Q: A 2 kg block is pushed 4.0 m along a horizontal floor by a force of magnitude 25 N at an angle…

A: Apologies. We only answer three parts at a time. we will answer the first three as the exact one…

Q: A 19.8 kg block is dragged over a rough, horizontal surface by a constant force of 183 N acting at…

A: Work done by the frictional force is,

Q: A 2 kg block is pushed 4.0 m along a horizontal floor by a force of magnitude 25 N at an angle…

A:

Q: 1. Work is done on the object in the following situations EXCEPT A. lifting a bag C. pushing a rigid…

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Q: determine the final speed of the box (in m/s) after sliding across the rough section of fl

A: Decrease in kinetic energy is equal to the work done by friction. Ki-Kf=Wf Here Ki is the initial…

Q: A soccer player strikes a 428 gram ball with an initial velocity of 27.4 m/s. The ball strikes the…

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Q: Identify a case where an object is moving over a surface with friction, but the frictional force…

A: When the object moves in a pure rolling motion, the work done by the friction will be zero.

Q: A cord is used to vertically lower an initially stationary block of mass M = 8.7 kg at a constant…

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Q: A box of mass 11 kg is released at point A and slides to the bottom of a rough incline. The box then…

A: Given: mass of object (m) = 11 kg Angle of incline (θ) = 30°Compression of spring (x) =17.5 cm=0.175…

Q: A 60.0 kg skier with an initial speed of 12.0 m/s coasts up a 2.50-m—high rise.  Find her final…

A: skier weight=60.0 kg speed of skier= 12.0 m/s height= 2.50 m coefficient of friction= 0.0800 angle…

Q: As shown in the figure below, a box of mass m = 54.0 kg (initially at rest) is pushed a distance d =…

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Q: A 35.5 kg box initially at rest is pushed 5.75 m along a rough, horizontal floor with a constant…

A: Recall W=Fdcosθ When θ=900 W=0 Also work kinetic energy theorem ∑W=∆KE

Q: A box of unknown mass is sliding with an initial speed v₁ = 4.30 m/s across a horizontal…

A: Intial velocity of box = 4.3m/s Rough section of floor=2.8m Coefficient of kinetic friction=0.1 Let…

Q: You throw a stone with a mass of 215 g straight up in the air. It reaches a maximum height of 12.0…

A: Given : Mass of stone (m) = 215 g = 0.215 kg Height (h) = 12 m

Q: A 2.00 kg block is released from rest on a ramp that is inclined at an angle of 60.0∘∘ below the…

A: mass of block = 2 kg θ = 60o below the horizontal Initial height (h) = 2 m initial velocity on the…

Q: Problem 1: A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well…

A: Given data:  Work done due to force F1 Wf = 484.5 J Work done due gravity Force Fg Wg = -344.8 J…

Q: Q.3. A 50.00-kg skier is at the top of a 100-m high slope. (a) Using conservation of energy…

A: Given Data: The mass of the skier is, m = 50 kg. The height of the slope is, h = 100 m. (a) From,…

Q: A force of 200 N displaces a body by 4 m, calculate the work done (in J). A) 40 B) 500 C) 80 D) 800

A: Given Data: The force applied is, F = 200 N. The displacement happened is, s = 4 m. The work is…

Q: When a car of mass 1167 kg accelerates from 10.0m / s to a certain final speed, 4.00x10 ^ 5J of work…

A: Given Mass m = 1167 kg Initial velocity u = 10 m/s Work done = 4 × 105 J

Q: A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well that is hy =…

A: Given:The depth of the well is 9.5 m. The force is 59.5 N. The total mass is 3.1 kg.

Q: On a frozen pond, a 8.54-kg sled is given a kick that imparts to it an initial speed of…

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Q: 1.1 A valuable antique chest which weighs 1400 N is to be moved into a truck. To get the chest from…

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Q: 7) A1,000[kg] rock is moved from the north end of a parking lot to the south end. The parking lot is…

A: Since, work done(W) is defined as the product of Force(F) and displacement(d).Mathematically:-…

Q: A bag of sand which acts as a counter weight for a stage set is suspended vertically by a rope of…

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Q: A 2 kg block is pushed 4.0 m along a horizontal floor by a force of magnitude 25 N at an angle…

A:

Q: A box of unknown mass is sliding with an initial speed vi = 4.40 m/s across a horizontal…

A: Let vf be the final speed of the box after traveling a distance d, and µk is the kinetic friction…

Q: A car with the mass m=1600kg coasts down an incline from an initial height of h=7m with an initial…

A: W=12mv2f-mgh-12mv2i

Q: 1. A man carries a load of 500 N to a distance of 100 m. The work done by him is B. 50,000 Nm C.0 D.…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Starting from rest, a 4.3-kg block slides 2.40 m down a rough 30.0° incline. The coefficient of…

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Q: A worker pushed a 27 kg block 9.2 m along a level floor at constant speed with a force directed 32…

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Q: Hk=0.38. If the speed of the block v=7m/s when it leaves the inclined plane, determine the work done…

A: Given data: The mass of block is m=1.64 kg. Coefficient of friction is μk=0.38. Velocity of block…

Q: Find the work done in joules by gravity as an object of the mass m 5 kg is raised up at constant…

A: Mass of object m = 5 kg Initial height h1 = 26 m Final height h2 = 69 m g = 10 m/s²

Q: 2. A particle undergoes displacement, s = -41 – 5ĵ m when acted by a force, F = 3î – 5ĵ N. Calculate…

A: Note - Since you have asked multiple question, we will solve the first question for you. If you want…

Q: A snowboarder and her board (combined mass 40.0 kgkg) are moving at 9.30 m/sm/s at the bottom of a…

A: Solution: Given that total mass m = 40 kg speed v = 9.3 m/s height achieved due to friction h' = 3.5…

Helmholtz Free Energy

The Helmholtz free energy is a thermodynamic potential used to calculate the measure of useful work from a closed system. This system is kept at constant temperature and volume. German physicist Hermann Helmholtz introduced this concept in 1882.