Four railroad cars, each of mass 2.50 x 104 kg, are coupled together and coasting along horizontal tracks at speed vi toward the south. A very strong but foolish movie actor, riding on the second car, uncouples the front car and gives it a big push, increasing its speed to 4.00 m/s southward. The remaining three cars continue moving south, now at 2.00 m/s. (a) Find the initial speed of the four cars. (b) By how much did the potential energy within the body of the actor change?

Q: Identical twins, each with mass 49.0 kg, are on ice skates and at rest on a frozen lake, which may…

A:

Q: A baseball (m = 153 g) approaches a bat horizontally at a speed of 37.6 m/s (84.1 mi/h) and is hit…

A: Given:  Mass of the ball (m) = 153 g = 0.153 KgInitial speed of the all u = 37.6 m/sFinal speed of…

Q: In a physics experiment, two equal-mass carts roll towards each other on a level, low-friction…

A:

Q: Three objects are situated along the x axis as follows: a 1.5.00-kg object is located at -2.00 m, a…

A: m1 = 1.5 kg x1 = -2 m m2 = 2 kg x2 = 1.5m m3 = 3 kg x3 = 0m

Q: An object of mass 4 kg, moving with an initial velocity of (5î )m/s, collides (pa) with and sticks…

A: Let object A mass Ma = 4 kg  object B has a mass Mb = 2 kg  Initial velocity of A is (Va)i = ( 5 î )…

Q: Three objects are situated along the x axis as follows: a 1.5.00-kg object is located at -2.00 m, a…

A: first mass = 1.5 kg location of first mass = -2 m second mass = 2 kg location of second mass = 5 m…

Q: A stone of mass m = 1.55 kg is dropped from a height of h = 3.9 m into a pool of water. At a time of…

A: Mass of stone (m) = 1.55 kg Initial height (h) = 3.9 m t = 1.9 s

Q: Two persons on ice skates stand face-to-face and then push each other away. Their masses are 60 and…

A:

Q: Three skydivers are plummeting earthward. They are initially holding onto each other, but then push…

A: Since initially, the skydivers plummet earthward, that is, the motion is vertically downward, their…

Q: A baseball (m = 152 g) approaches a bat horizontally at a speed of 43.6 m/s (97.6 mi/h) and is hit…

A:

Q: 2. Block 1 of mass m, slides from rest along a frictionless ramp from height h = 1.60 m and then…

A: (a) The mass of the block is m1 kg. The height of the block is h = 1.60 m. As the surface is…

Q: Two figure skaters are coasting in the same direction, with the leading skater moving at 5.5 m/s and…

A:

Q: baseball (m = 149 g) approaches a bat horizontally at a speed of 40.3 m/s (90 mi/h) and is hit…

A: Given data: mass of the ball m = 0.149 kg initial speed u = 40.3 m /s    Final speed v = -50.0  m/s…

Q: Car 1 has a mass of 1.50 × 10° kg and is moving at a constant speed of 4.00 m/s. It strikes Car 2,…

A: Given: Mass of C1=1.50×103Mass of C2=1.20×103Mass of C3=1.80×103Velocity V1=4.0 m/s

Q: Identical twins, each with mass 47.0 kg, are on ice skates and at rest on a frozen lake, which may…

A: Given : m1 = m2 = 47 kg mpack = 12 kg vpack = 2.70 m/s

Q: Two ice skaters, with masses of 75 kg and 55 kg, stand facing each other on a 15-m-wide frozen…

A: Given data Initially, both the skaters are at rest

Q: An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.99 m/s.…

A:

Q: A system of four particles moves along one dimension. The center of mass of the system is at rest,…

A:

Q: Question 3-c, Numerical: Consider the collision of a bouncing tennis ball with a wall as sketched in…

A:

Q: A 65.0 kg  diver, dives horizontally off a 375 kg raft initially at rest. If the diver's speed…

A:

Q: An object of mass 3 kg, moving with an initial velocity of (5t)m/s, collides (b) with and sticks…

A:

Q: You have two identical cars, both of mass 2,459 kg. The first one is moving to the left with an…

A:

Q: A 15 kg tuna fish moving horizontally to the right at 5 m/s swallows a 2 kg dalagang bukid that is…

A:

Q: A railroad car of mass 23000 kg moving at initial speed v collides and couples with two coupled…

A: Given mass of railroad car = 23000 kg initial speed of railroad car = v collides couples with two…

Q: A bullet of mass m initially traveling at speed v imbeds itself in a wooden block and travelsΔx…

A:

Q: Nicholas, with a mass 82.0 kg, jumps vertically upward to a maximum height of 49.0 cm. With what…

A: The mass of Nicholas is m = 82.0 kg. The maximum vertical height of jump is h = 49.0 cm = 0.49 m.…

Q: Two asteroids collide and stick together. The first asteroid has mass of 30 x 10° kg and is…

A:

Q: A stone of mass m = 1.45 kg is dropped from a height of h = 3.6 m into a basin of water. At a time…

A: The velocity of an object free falling from a certain height is given by v = 2gh, where g =…

Q: A 100 kg man and 50 kg woman on ice skates are standing and facing each other. If the woman pushes…

A: Given       Mass of man m = 100kg       Woman mass mw= 50 kg       Final speed man vM= 2 m/sAsked…

Q: An object of mass 4 kg, moving with an initial velocity of (5t )m/s, collides (pahay) with and…

A:

Q: A skater of mass 72.5 kg initially moves in a straight line at a speed of 4.80 m/s. The skater…

A:

Q: Two figure skaters are coasting in the same direction, with the leading skater moving at 6.5 m/s and…

A:

Q: A baseball mass 145.00 g approaches a bat horizontally at a speed of 34.70 m/s and is hit straight…

A: Given  Mass of baseball m = 145.00 g Initial velocity of ball v1 = 34.70 m/s Final velocity of ball…

Q: A hockey player with a mass of M = 72 kg, standing on ice, pushes a plate with a mass of m = 0.5 kg…

A: Given information Mass of the hockey player M=72 kg. Mass of the plate m=0.5 kg. Velocity of the…

Q: Two ice skaters push off against one another starting from a stationary position. The 45.0-kg skater…

A: Given Mass of each skater is m1=45.0 kg and m2=60.0 kg

Q: A reckless coyote engineer straps on a pair of ice skates and attaches a rocket capable of producing…

A: The motion mentioned here is with constant force acting on the object which shows motion with…

Q: A 6100 kg rocket is set for vertical firing from the ground. If the exhaust speed is 1200 m/s, how…

A:

Q: dentical twins, each with mass 62.0 kg, are on ice skates and at rest on a frozen lake, which may be…

A: Given: Here we are given two identical twin skaters A and B of mass 62.0 kg each, they both are on…

Q: An open train car, with a mass of 2050 kg, coasts along a horizontal track at the speed 2.792.79…

A: If the net external forces acting on the system add up to zero, then the linear momentum of system…

Q: A railroad car of mass 23000 kg moving at initial speed v collides and couples with two coupled…

A: Using the conservation of momentum we will solve the question.