A freight train consists of two 9.00 ✕ 105 kg engines and 50 cars with average masses of 3.50 ✕ 105 kg.   (a) What force (in N) must each engine exert backward on the track to accelerate the train at a rate of 4.00 ✕ 10−2 m/s2 if the force of friction is 7.50 ✕ 105 N, assuming the engines exert identical forces? This is not a large frictional force for such a massive system. Rolling friction for trains is small, and consequently, trains are very energy-efficient transportation systems. (Enter the magnitude.)   b) What is the magnitude of the force (in N) in the coupling between the 37th and 38th cars (this is the force each exerts on the other), assuming all cars have the same mass and that friction is evenly distributed among all of the cars and engines? (Assume both engines are at the front of the train.)

Q: A time-dependent force,  = (7.40i - 3.80tj) N (where t is in seconds) is applied to a 2.00 kg object…

A:

Q: vo teams of six members engage in a tug of war. Each of the first team's embers has an average mass…

A:

Q: A bicyclist can coast down a 8.18 degree hill at a constant speed of 5.55 km/h. If the force of air…

A: Given , Fair = cv V= 5.55km/h V' = 19.3km/h Mass of cyclist plus bicycle m = 78.6 kg

Q: accelerating at 1 m/s^2 and there is a coefficient of kinetic friction between the tracks and the…

A:

Q: the law of rectilinear motion of a body of mass m=1009 is x(t) = 10 +1t+5t^2.All quantities in the…

A: This problem is based on Newton's second law. According to Newton's second law, the net force on a…

Q: Given two forces that act on an object of mass 3.0 kg: F1 with magnitude 24 N and direction 45…

A: Assume the east direction to be +x axis and the north direction to be +y axis. Then the components…

Q: Three forces acting on an object are given by  F1 = (−2.1î + 5.55ĵ) N, F2 = (5.30î − 1.6ĵ) N, and…

A:

Q: A freight train has a mass of 1.2 ✕ 107 kg. If the locomotive can exert a constant pull of 6.9 ✕ 105…

A: freight train has a mass = 1.2 ✕ 107 kg vi = 0 m/s vf = 70 km/h = 19.44 m/s F(locomotive) = F(pull)…

Q: An object of mass 5.10 kg has an acceleration a= (1.17 m/s² )x+(-0.681 m/s² )ŷ. Part A Three forces…

A: Write the given values with the suitable variables. m=5.10 kga→=1.17x^+-0.681y^ m/s2F→1=3.51x^…

Q: A body of mass 1 kg is moving along a straight line with a velocity of 1 ms'. The external force…

A: Newton's second law for constant mass is  F=ma Where F is the force m is the mass of the object a is…

Q: A stone used in the sport of curling has a mass of 18.0 kg and is initially at rest, sitting on a…

A:

Q: A freight train consists of two 8.00 × 105 -kg engines and 45 cars with average masses of 5.50 × 105…

A: It is given that,

Q: The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously…

A:

Q: WR = 30 m/s mHA = 5000 kg m, = 150 kg ►VHA = 200 m/s h=10000

A:

Q: A 3.40-kg object is moving in a plane, with its x and y coordinates given by x = 3t2 − 2 and y = 2t3…

A:

Q: a) A 2 kg object is subjected to three forces that give it an acceleration 7…

A: Given: The mass of object is m=2 kg. The acceleration of the object is a→=-8.00 m/s2i^+6.00 m/s2j^.…

Q: The velocity of a 3.00 kg particle is given by i = (8.00ti + 3.00ť² j)m/s,with timet in seconds. At…

A:

Q: In a pandayan (foundry), a pot made of cast iron slid and came to a complete stop a surface also…

A:

Q: The figure shows a 6 kg block being pulled along a frictionless floor by a cord that applies a force…

A: Given data: Force acting on the block is, F=15 N The mass of the block is, m= 6 Kg

Q: A 3 kg object has a velocity of 3i m/sat one instant. 8 seconds later, its velocity is (5i + 7j)…

A: mass = 3 kg initial velocity = 3 i^ msfinal velocity = 5i^ + 7j^ mstime = 8 seconds

Q: A driver in a 1500-kg car driving at 10.0 m/s gently presses the brakes momentarily. The brakes…

A:

Q: A train locomotive pulls a train with a mass of 1.40 ✕ 107 kg on level rails. The locomotive exerts…

A:

Q: Two forces FA and FB are applied to an object whose mass is 6.11 kg. The larger force is FA. When…

A: Given that, mass of object (m) =6.11 kg

Q: Three forces acting on an object are given by F, (-2.351 + 6.95j) N, F, (4.701 - 1.65j) N, and F,…

A:

Q: A bicyclist of mass 65.0 kg (including the bicycle) can coast down a 6.0 degree hill at a steady…

A:

Q: A box of mass 30.0 kg is acted on by a constant horizontal force, which moves the box from rest 15.0…

A:

Q: Three F forces 1 = (2.00î + 2.00ĵ) N, F2 = (−5.00î− 3.00ĵ) N and F3 = (4.50î) N act on a body,…

A:

Q: The mass of an object is 25 kg.  Its acceleration is ( 3 ı ^ + 5 ȷ ^ + 7 k ^ ) m/s2.  Calculate the…

A: The equation for the force is given as The vector form of force can be obtained as

Q: Three forces acting on an object are given by  F1 = (−1.5î + 7.10ĵ) N,  F2 = (5.10î − 1.55ĵ) N, and…

A:

Q: and (b) the magnitude of FB. i Units 11

A:

Q: The velocity of an object of mass m= 5.00 kg is giving by v(t) = (3.0m/s3)t2+ (2.00 m/s2)t.  The…

A:

Q: A 3.45-kg object is moving in a plane, with its x and y coordinates given by x = 6t2 − 4 and y = 4t3…

A: The x-component of velocity is v=dxdt=ddt6t2-4=12t The y-component of velocity is…

Q: Three forces acting on an object are given by F₁ = (-2.151 +7.401) N, F₂ = (5.501 - 1.051) N, and F3…

A:

Q: Three forces acting on an object are given by - (2.15i + 6.95j) N, - (5.30 - 1.2) N, and F- ( 49) N.…

A: Ans:- Image-1

Q: A boat with mass of 5.8 * 10° kg is traveling at 9.1 * 10' m/s. What is the magnitude of the force…

A: Given data:  Mass (m) = 5.8×103 kg Initial velocity (v0) = 9.1×101 m/s Final velocity (v) = 0 m/s…

Q: object is acted on by two forces, 10i + 3j and  (with magnitudes in newtons). The object has an…

A: Force is given as F = 10i +3j    Approch ist find the magnitude of force  Then apply newtons 2nd…

Q: A crate is sitting on a horizontal surface where the coefficient of static friction is 0.60. A…

A: Options which are true - (A) As the crate is not moving so only static friction of coefficient will…

Q: A small locomotive of mass 500 kg pulls 2 coaches of mass A 120 kg each and mass B 180 kg. If trains…

A:

Q: Two forces FA and FB are applied to an object whose mass is 12.1 kg. The larger force is FA. When…

A: Given Mass of the object is m=12.1 kg Acceleration in the first case is a=0.592 m/s2 Acceleration in…

Q: The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously…

A: nucleus of 8Be; having,  4 protons and 4 neutrons; distance = 3.60 ✕ 10−15 m  mass of an alpha…

Q: Three forces acting on an object are given by F₁ = (-1.951 +5.651) N, F₂ = (4.751 1.35ĵ) N, and F3 =…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: As a fish jumps vertically out of the water, assume thatonly two significant forces act on it: an…

A: a)Acceleration is given by

Q: A person is pushing two boxes placed side by side with each other. What is the acceleration caused…

A: Free body diagram of block-1; Free body diagram of block-2;

Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.