A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.

Q: Calculate the final velocity right after a 119 kg rugby player who is initially running at 7.55 m/s…

A: The given data are: m=119 kgu=7.55 m/sF=18100 Nt=5.5×10-2 s Here, m, u, F, and t represent the mass,…

Q: Two friends are standing on opposite ends of a canoe that is initially at rest with respect to a…

A: Since there is no external force in the horizontal direction the momentum of the system remains…

Q: Two balls (A and B) of masses (K, 2 kg) fell in order at the same time together, ball (A) fell from…

A: Mass of A = k Mass of B = 2 kg Height of A above the ground = 8 m

Q: The strong man will push the two initially stationary freight cars of equal mass apart before he…

A: The force acting in the system is an internal force. The momentum of the system must be conserved…

Q: A 29-gram bullet traveling at 239 m/s penetrates a 5-kg block of wood and emerges clearly at 162…

A:

Q: A 10,184-kg railroad car traveling at a speed of 38 m/s strikes an identical car at rest. If the…

A: Dear student During collision the momentum remains conserved. The momentum is defined as: P = mv

Q: A machine gun fires 10 bullets /s, each of mass 12 g the speed to each bullets is 16 cm/-1 then…

A: Given: A machine gun fires, 10 bullets per second mass of 1 bullet, mb = 12 gSpeed of each bullet, v…

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

A: Data provided:  Mass of block (m) = 0.50 kg Initial velocity of block (Vi) = 0 m/s, rest Force upon…

Q: A white ball of mass 0.6 kg moving at 10.0 m/s collides with a 0.5 kg black ball initia of 5.0 m/s.…

A: Givenmwhite=0.6 kg , mblack=0.5 kgBefore collisionuwhite=10 m/s ,  uBlack=0After collisionvwhite=5…

Q: Two balls of equal mass and of perfectly elastic material are lying on the floor. One of t the…

A: Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the the…

Q: A softball of mass 0.200 kg that is moving with a speed 10.3 m/s collides head-on and elastically…

A:

Q: A golf ball of mass 0.050 kg is at rest on the tee and has a velocity of  102 m/s immediately after…

A:

Q: A dog weighing 36 kg, is standing on a flatboat so that he is 23 m from shore. He walks 16 m on the…

A: It is given that,

Q: Two bodies of equal mass m collide and stick together. The quantities that always have equal…

A: The change in momentum is having equal magnitude and oppositely directed.

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

A:

Q: A 5.0 kg rifle recoils with a speed of 8.0 m/s when a bullet with a mass of 64 g is fired. The…

A: Given:Mass,m1=5kgspeed,v1=8m/sMass of bullet,m2=64×10-3 kgFind the Muzzle speed,v2Now,From…

Q: A 50-kg swimmer dives horizontally off a 450-kg raft. If the diver's speed immediately after leaving…

A: Given value--- mass of swimmer = 50 kg. mass of raft = 450 kg. speed of swimmer = 3 m/s. We have…

Q: Determine the velocity for each car after the collisions.

A: As per the work-energy theorem, Here, K, Wf, m, v, f, d, and θ represent the car’s kinetic energy,…

Q: A small squishy ball is thrown against the side of a large cube of concrete. While the objects are…

A: From Newton’s third law of motion, the action and reaction pair are equal in magnitude.

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

A:

Q: A 65-kg ice skater coasts with no effort for 75 m until she stops. If the coefficient of kinetic…

A: Acceleration of the skater

Q: A 2 kg mass moving to the right makes an elastic head-on collision with a 4 kg mass moving to the…

A: Let the direction along right be positive  And the direction along left be negative M1 = 2 kg  M2 =…

Q: Why is it easier to stop a lightly loaded truck than a heavier one that has equal speed?

A:

Q: A 90-kg halfback running north with a speed of 10 m/s is tackled by a 120-kg opponent running south…

A: Mass of first player (m) = 90 kg Mass of second player (M) = 120 kg Speed of first player (u) = 10…

Q: A golf ball of m=0.05 kg reaches a speed of 95 m/s, 0.01 seconds after it was released. What force…

A: Given data:  Mass (m) = 0.05 kg Initial velocity (v0) = 0 m/s Final velocity (v) = 95 m/s Time (t) =…

Q: Given a collision in which car #1 of mass 5,000 kg collided with car #2 of mass 2,500kg . If the…

A: Given data: Mass of the car 1 is, m1 = 5000 kg Mass of the car 2 is, m2 = 2500 kg The magnitude of…

Q: How much linear momentum does an 1800 kg car have when moving at 15 m/s?

A:

Q: A curved incline is used to give a box a certain velocity as it slides down. The box has a mass of…

A:

Q: After falling from rest from a height of 30 m, a 0.50 kg ball rebounds upward reaching a height of…

A: Given The height from which ball is fall is h1=30 m. The mass of ball is m=0.50 kg. The height from…

Q: A 0.24 kg blob of clay is thrown at a wall with an initial velocity of 23 m/s.  If the comes to a…

A: Acceleration is the change in velocity over time.

Q: A bullet has a mass of .01k kg and is fired from a gun with an unknown speed of v. The bullet…

A:

Q: A machine gun fires 13 bullets / s each of mass 24 g the speed to each bullets is 32 cm/s, then…

A: Given data :   Number of bullets   =   N   Speed of each bullet   =  v    Mass  of  each  bullet   =…

Q: Why is it easier to stop a loaded truck than a heavier one that has equal speed?

A: Work required to stop a vehicle is equal to the kinetic energy of the vehicle.

Q: A body of mass 15 kg moving with velocity of 2 m/s is acted upon by a force of 75 N for two seconds.…

A: Mass (m) = 15 kg initial velocity (u) = 2 m/s Applied force (F) = 75 N Time (t) = 2 seconds

Q: Cars are equipped with padded dashboards. In collisions, the padded dashboards would be safer than…

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Q: Which has the larger linear momentum:

A:

Q: A machine gun fires 18 bullets / s each of mass 24 g the speed to each bullets is 34 cm/s, then…

A: Given data :   Mass  of  the  each  bullet    =  m   Number   of   bullets   =   N     Speed  of…

Q: The momentum of a moving object will change if O the velocity remains the same the object is not in…

A: We need to examine which situation is going to result in change in momentum of an object.

Q: A diver with a mass of 80 kg jumps from a dock into a 130 kg boat at rest on the west side of the…

A: Applying the conservation of angular momentum,

Q: Which material is likely to experience a highly inelastic collision? a steel ball on a steel plate a…

A: To identify : The material which experiences highly inelastic collision

Q: What impulse occurs when an average force of 10N is exerted on a cart for 2.5 sec?

A: The average force, F=10 N   The time, t=2.5 s

Q: After falling from rest from a height of 31 m, a 0.60-kg ball rebounds upward, reaching a height of…

A: Assume that the velocity in downward direction is negative and in upward direction is positive.…

Q: A machine gun fires 10 bullets/s, each of mass 10g, the speed to each bullet is 20 cms, then force…

A:

Q: A machine gun fires 6 bullets /s, each of mass 12 g the speed to each bullets is 16 cm/-1 then force…

A:

Q: Two freight trains have a complete inelastic collision at a track crossing. Engine 1 has a mass of…

A:

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”