You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 1515 lb and was traveling eastward. Car B weighs 1125 lb and was traveling westward at 42.0 mph. The cars locked bumpers and slid eastward with their wheels locked for 19.5 ft before stopping. You have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750. How fast (in miles per hour) was car A traveling just before the collision? (This problem uses English units because they would be used in a U.S. legal proceeding.) speed of car A: mph

Q: A group of students carry out an experiment in which they want to find the coefficient of kinetic…

A: when a mass is placed on the top of the box then it also exert a normal force which is added to…

Q: Consider the system of two crates shown below, which are tethered to each other by a massless…

A: Solution: given that m1 = 35 kg m2 = 60 kg L = 22 m angle = 31.7 degrees coeff of kinetic friction =…

Q: An athlete pulls box E using an inextensible rope P while being resisted by another inextensible…

A: Solution:-Given thatmass of box E (m)=63 kgcoefficient of static friction (μs)=0.32coefficient of…

Q: A rock of mass m falls from the top of a cliff and it experiences a significant amount of air drag…

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Q: A 10 kg-block moves on a smooth horizontal surface with a speed of 10 m/s and slides into another…

A: Given data: Mass = 10 kg Initial speed = 10 m/s Coefficient of friction = 0.25 Need to determine the…

Q: You bring a small remote controlled boat with a mass of 2.2kg to a small pond to rest it out.…

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Q: A car traveling at 20 m/s runs into a bridge abutment and crumples for 1.2 m before coming to a full…

A: Given: The intial speed of the car is 20 m/s. The distance traveled by car is 1.2 m. The final speed…

Q: A driver drives his 1225.0-kg vehicle heading north and then turns east at an intersection. It…

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Q: A big block (mass M), initially resting on a frictionless ground, starts to move due to a little…

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Q: A particle of mass 4 kg is undergoing one-dimensional motion. It is subject to a constant force of…

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Q: Using the values in the table, make a graph in excel and determine the value of the coefficient of…

A: Coefficient of kinetic friction = slope of Normal strength- applied force graph The applied force is…

Q: A small rocket of weight 0.3 lbs is launched vertically with thrust 3 lbs from a stand on the ground…

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Q: A dated box of dates, of mass 7.1 kg, is sent sliding up a frictionless ramp at an angle of θ to the…

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Q: A block of mass m1 is placed on top of a block of mass m2. You push the two blocks so that they move…

A: Free body diagram of the mass m2 is shown below.

Q: Consider an object on an incline where friction is present. The angle between the incline and the…

A: Mass of object = m Angle of incline = θCoefficient of kinetic friction = μk

Q: The net force on block A equals to 47.4 N, and the mass of block A is 14.5 kg.  If at t=0 sec, the…

A: Write the given data with suitable variables. F=47.4 Nm=14.5 kgu=0 m/st=4.8 s Here, F denotes the…

Q: A car is accelerating with constant acceleration A. Block of mass m1 moving to the right as block of…

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Q: A 0.18- kg block on a wooden table is given a sharp blow with a hammer. The block then slides across…

A: Let m denotes the mass, Fmax denotes the maximum force, t denotes the base of the isosceles…

Q: A 13 g bullet pierces a sand bag 32 cm thick. If the initial velocity of the bullet was 68 m/s and…

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Q: A small block of mass m2 is placed on top of a large block of mass m1 at rest on a horizontal…

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Q: runner of mass 51.1 kg starts from rest and accelerates with a constant acceleration of 0.8 m/s2…

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Q: The three blocks shown are identical. Blocks B and C are at rest when block B is hit by block A,…

A: The given situation is depicted in the following figure. According to the question, Before…

Q: A vehicle with a mass of 3087.02 kg is being tested for its engine consumption by measuring the…

A: Solution: As given that m = 3087.02 kg coefficient of kinetic friction of the wheels is 0.67 initial…

Q: A 5-kilogram object is moving in a plane, with its x and y coordinates given by: x(t) = 5t2? 1 ,…

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Q: The coefficient of friction between the wheels of Yamaha motorcycle and the dry pavement is 0.79. An…

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Q: Problem 2: A block with a mass of m = 31 kg rests on a frictionless surface and is subject to two…

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Q: A 2.80-kg block starts from rest at the top of a 30.0° incline and slides a distance of 1.70 m down…

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Q: At one point in time, a 17.5 kg sled is moving over a horizontal snow surface at a speed of 3.50 m /…

A: Given: The mass of sled is m=17.5 kg. The speed of sled is v=3.50 m/s. The time after sled stops is…

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Q: A 91 kg janitor wearing running shoes is running across an ice rink at a speed of 3.2 m/s. They try…

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Q: Write an expression for the component of net force, Fnet,x, in the x direction, in terms of the…

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Q: Two identical balls of mass m are attached to the ends of a massless rod of length L. The rod is…

A: To answer: a) Give the speed and acceleration of the upper ball as a function of the angle α between…

Q: In a pulley mass experiment, you have two blocks of masses M₁ and M₂ are connected with an ideal…

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Q: Consider the pic below. Mass 1 is 1Kg, mass 2 is 2Kg, and mass 3 is 10Kg. The coefficient of kinetic…

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Q: A semi is traveling down the highway at a velocity of v = 27.5 m/s. The driver observes a wreck…

A: The frictional force due to kinetic friction is given by Ff = μkN, where μk = coefficient of kinetic…

Q: A semi is traveling down the highway at a velocity of v = 27.5 m/s. The driver observes a wreck…

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Q: t of kinetic fricti

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Q: In the situation shown below, 01-67.3°, 02 = 23.7° and the initial velocity is zero. The masses are…

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Q: A block of mass m =2.2 kg slides on the ground. At the start of the slide, the velocity of the block…

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Q: Situation 03. A skier is on a 25 slope and his mass is 80kg. If his constant velocity and the…

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Q: In the figure, a 4.00 kg block is sent sliding up a plane inclined at 0 = 39.0° while a horizontal…

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Q: 3. A 5 kg block is initially at rest on a horizontal frictionless surface. Two forces, F = (4 – x²)î…

A: The total force on the block is the sum of two forces, i.e. F→=F→1+F→2F→=4-x2i + 4 j     (1)…

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: