A 850-kg car slows to rest from a speed of 82.5 km/h in a distance of 105 m. Consider that the car is initially traveling in the positive direction. A)If the brakes are the only thing making the car come to a stop, calculate the force (in newtons, in a component along the direction of motion of the car) that the brakes apply on the car. B) Suppose instead of braking that the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force, in newtons, exerted on the car in this case. C) What is the ratio of the force on the car from the concrete to the braking force?

Q: An adventurous archaeologist crosses between two rock cliffs, with a raging river far below, by…

A: Here when hero reaches at center of rope, he stays and is in equilibrium. So  ∑Fx=0∑Fy=0∑Fz=0Using…

Q: which of the following situations is the net force on the body zero?

A: In this question we have to answer in which situations the net force is zero. Please give positive…

Q: 1. Carol, who is 60 kg, is driving her çar at a speed of 25 m/s. She sees a dog crossing the road…

A:

Q: A car of mass 250 kg, is accelerated from rest by a net force of 400 N for 20 s.  After this, the…

A: Given: Mass (m) = 250 Kg  time (t1 ) = 20 s  Force (F1) = 400 N  Force (F2) = 100 N

Q: What net external force is exerted on a 1500-kg artillery shell fired from a battleship if the shell…

A:

Q: A block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of 0 = 50.0°…

A:

Q: A 1.00 x 103 car is pulling a 300.-kg trailer. Together, the carand trailer have an acceleration of…

A: Part A:

Q: If it actually hits the ground with a speed of 9.00 m/s, what is the magnitude of the average force…

A:

Q: Explain Newton's third Law and solve related problems Given a collision in which car #1 of mass…

A: Newton’s third law states that every action has an equal and opposite reaction.

Q: A block of mass 3.00 kg is pushed up against a wall by a force PS that makes an angle of u5 50.0°…

A: Given,The mass of the block = 3kg=mThe applied force on the block = PThe angle made by the force…

Q: A ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes over a…

A: (1)Analyze the FBD of the blocks. Note- Consider the rightward direction along the inclined plane…

Q: 96. GO A person with a black belt in karate has a fist that has a mass of 0.70 kg. Starting from…

A: Given ,massm=0.7 kgvelocityv=8m/stimet=0.15 seconds

Q: Using Newton's First Law, explain why, in a frictionless environment, a cat that is under motion…

A: Using Newton's First Law, explain why, in a frictionless environment, a cat that is under motion…

Q: What net external force is exerted on a 1500-kg artillery shell fired from a battleship if the shell…

A: The mass of the artillery shell is, m=1500 kg   The acceleration of the artillery shell is,…

Q: A 100 kg go-kart travels at a velocity 2 m/s and then quickly stops in 8 seconds to avoid an…

A: Here, a=∆v∆t=0m/s-2m/s8s=-0.25m/s2

Q: Which of the following best describes the reason that a car can stop more quickly on dry pavement…

A:

Q: A passenger sitting in the rear of a bus claims that she was injured as the driver slammed on the…

A: Given statement : A passenger sitting in the rear of bus is injured as a suitcase come flying…

Q: a constant horizontal force F of magni- : app tude 20 N is applied to block A of mass mA 4.0 kg,…

A: The acceleration of the blocks is given by,

Q: A 60 kg man riding a 15 kg bicycle took 8 seconds to reach a constant speed 4.0 m/s from rest.…

A: Given Data : The mass of the man is given as m = 60Kg. The mass of the bicycle is given as mb =…

Q: A block with mass m1 hangs from a rope that is extended over an ideal pulley and attached to a…

A:

Q: Two forces are acting on a 5.0-kg object that moves with acceleration 2.0 m/s2 in the positive…

A: Given  The magnitude of the force in the positive x-direction is F2 = 12 N. The mass of object…

Q: The parachute on a drag racing car deploys at the end of a run. If the car has a mass of 950 kg and…

A: Given quantities: mass of the car (m) = 950 kg initial velocity (u) = 44 m/s final velocity (v) = 0…

Q: To ice skaters of equal mass push against one another and afterwords move in opposite directions…

A: This  problem can be solved by concept of Newtons third law. Which states that for every action…

Q: Calculate the acceleration of the 2000 kg twin engine aircraft just before takeoff when the thrust…

A: From Newton's law the expression for force is a=Fm=1100 N2000 kg=0.55 ms2 Therefore, the…

Q: A block of mass 3.00 kg is pushed up against a wall by a force PS that makes an angle of u5 50.0°…

A:

Q: On a cold winter day, a car tries to get moving on an icy road but does not get anywhere. What…

A: On a cold winter day, a car tries to get moving on an icy road but does not get anywhere.    Concept…

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A:

Q: A small car gets into a head on collision with an 18-wheeler. During the collision, which vehicle…

A:

Q: A 0.51 kg football is thrown with a velocityof 18 m/s to the right. A stationary receivercatches the…

A:

Q: A 3000-kg čar moving at 30 m/s on a straight road is stopped within 200 m by applying orakes. What…

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Q: What force does a trampoline have to apply to Jennifer, a 45.0-kg gymnast, to accelerate her…

A:

Q: In Figure 4.4, a locomotive has broken through the wall of atrain station. During the collision,…

A: According to the Newton’s third law of motion.Every action has equal and opposite reaction.

Q: B have masses me and my respectively. Neglecting friction between all surfaces, draw the FBD and KD…

A: Blocks A and B have masses

Q: A body of mass in falls through a medium that opposes its fall with a force per proportional to the…

A: The equation of motion is given as: md2xdt2=mg-kv2 v=x, where v= velocity x= distance of fall

Q: At the end of a roller coaster ride, the cars must slow to a stop, but the magnitude of the…

A: The magnitude of the maximum allowable force goes to completely stop the cars of the roller coaster…

Q: If a 0.50-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force…

A: Given,                 mass of block (m) =0.50 kg            initial velocity (vi) = 0 m/s…

Q: The combination of “crumple zones” and air bags/seatbeltsmight increase the distance over which a…

A: mass, m = 65 kg  initial velocity, u = 18 m/s  final velocity, v = 0 m/s  distance, d = 1 m

Q: A heavy box containing four laptops worth 700,000 pesos is being delivered to Dukue. From the…

A: mass of each laptop = 2 kgθ = 30oμk = 0.3number of laptops = 4

Q: A rocket-powered car provides a thrust of 250 kN at an angle of 10 degrees below horizontal (so some…

A:

Q: A mysterious rocket-propelled object of mass 46.5 kg is initially at rest in the middle of the…

A: Given Mass of object is m = 46.5 kg Applied force is F(t) = (16.4 N/s)t According to Newton's…

Q: A freight train consists of two 8.00×104-kg enginesand 45 cars with average masses of 5.50×104kg .…

A: Given Data: The mass of the engines are, me=8.00×104 kg The average mass of the cars is,…

Q: A high diver of mass 63.0 kg Jumps off a board 10.0 m above the water. If her downward motion is…

A: Given, Mass of diver =63 kg Height of board above water =10 m Time taken to stop the downward motion…

Q: A 59 kg boy and a 36 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy…

A: Using Newton's 3rd law,  The boy and girl exert same amount of force on each other using the elastic…

Q: (II) Figure 4–45 shows a block (mass m^) on a smooth hori- zontal surface, connected by a thin cord…

A: The block of mass mA is placed on smooth horizontal table and block of mass mB is hanging from…

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: