A 5.08×104 kgkg railroad car moves on frictionless horizontal rails until it hits a horizontal spring stopper with a force constant of 4.09×105 N/mN/m . When the railroad car comes to a complete stop, the compression of the spring stopper is 30 cmcm . How fast was the railroad car initially?

Q: A baseball with a mass of 275 g is pitched and reaches the catcher with a speed of 25 m/s. In…

A:

Q: Sue gets up on the roof to clean off the leaf litter. Upon trying to get back down the ladder, she…

A:

Q: What was the speed of a 14 g bullet if the block's mass is 2.5 kg and if the spring, with k = 50…

A: Given: From part (a) VB =Initial speed of the bullet VB=(kd2+mgd)(M+m)20.5(m+M)m2 m/s Here, m=14 g=…

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

A:

Q: On a frictionless canvas a 5.5 kg block can slide along the x-axis and is subjected to a force of 80…

A:

Q: 3. You wake up one morning to find yourself in a strange room with opaque walls, and no visible…

A: Given data:  Initial velocity (Vi) = 0 m/s Mass (m) = 75.8 kg Height (h) = 1.10 m Time (t) = 0.331 s…

Q: The driver of a car (1100 kg) traveling at 30 m/s on dry concrete sees a deer in the distance and…

A: The mass of the car m=1100 kg. The velocity of the car v=30 m/s. Standard values: Coefficient of…

Q: In the Loblaws parking lot, the cart attendants decide to have some fun during a winter morning. The…

A: When the cart is at rest only two forces are present:1) Weight of the cart acting vertically down2)…

Q: A 5 kg block falls from rest down a 7 m high frictionless hill. It collides with a stationary 2 kg a…

A:

Q: How long does it take a 2500 kg car to come to a stop from 15 m/s if it strikes a wall with a force…

A:

Q: A 7100-kilogram train car runs at a constant 16.0 m/s on a flat, frictionless track. Initially at…

A: Given data:  Mass of train car (m1) = 7100 kg Initial velocity of train car (V1) = 16.0 m/s Mass of…

Q: A cart of mass 4 kg is on frictionless surface and compressed against an ideal spring with spring…

A: Given data, Mass m1=4 kg Mass m2=8 kg Height h2=0.67 m Compression x=1.04 m Acceleration due to…

Q: 1. A 15-g bullet is shot vertically into an 2-kg block. The block lifts upward 8.0 mm (see the…

A: Mass of bullet= 15 g = 0.015 kg Mass of block= 2 kg The block lifts upward h = 8 mm = 8×10-3 m

Q: a 600 gram banana sliding north on a frictionless table at 2.5 meters per second bounces of a 400…

A: Mass of banana =600gm Initial speed of banana = 2.5m/s Mass of kiwi = 400gm Initial speed of kiwi =0…

Q: As part of a safety investigation, two 1400 kg cars traveling at 20 m/s are crashed into different…

A: Given mass of car m=1400 kgspeed of car u=20 msCars are crashed into different barriers .

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

A:

Q: A hockey puck (mass = 1 kg) leaves the players stick with a speed of 30 m/s and slides on the ice…

A: Magnitude of acceleration is, a=v22s=30 m/s22100 m=4.5 m/s2

Q: A child is sitting on a stationary skateboard with a pile of rocks which she throws in one direction…

A:

Q: a 600 gram banana sliding north on a frictionless table at 2.5 meters per second bounces of a 400…

A: Given,mass of banana mb=0.6kgub=2.5 m/svb=0.5 m/smas of kiwi mk=0.4kguk=0 m/s

Q: A 200 kgkg weather rocket is loaded with 100 kgkg of fuel and fired straight up. It accelerates…

A: Acceleration , a = 35 m/s2  Time , t = 32 s To find = rocket's maximum altitude

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

A:

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

A: Given data:  Mass (m) = 77.9 kg Initial velocity (Vi) = 0 m/s Height (h) = 1.79 m Time (t) = 0.302 s…

Q: One of the Kansas City Chiefs jumps up twice to celebrate the OT game winning touch down in the…

A:

Q: A 0.576-kg ball, initially moving with a speed of 2.93 m/s, bounces off a wall and then moves with a…

A:

Q: The diagram shows two identical particles (labeled 1 and 2) that are moving in the x-y plane. The…

A: We need to find the magnitude of the net angular momentum of the particles about the origin.

Q: A wooden block of mass M, attached to a massless spring with spring constant k, rests on its…

A:

Q: Part B Find the maximum height that the block reaches if the incline is 20.3 °. All surfaces are…

A:

Q: A 0.544-kg ball, initially moving with a speed of 2.54 m/s, bounces off a wall and then moves with a…

A:

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

A: Mass of the body (m) = 75.1 kg Height (h) = 1.38 m Time (t) = 0.424 sec

Q: A 13 N east

A: initial speed u = 2.5 m/s horizontal force F=13 N mass= 6.4 kg time, t=2.1 s

Q: Gayle runs at a speed of 3.75 m/s and dives on a sled, initially at rest on the top of a…

A: The initial speed of Gayle = 3.75 m/sThe initial kinetic energy of gayle and sled system =…

Q: Gayle runs at a speed of 4.70 m/s and dives on a sled, initially at rest on the top of a…

A:

Q: A forest fire is easiest to attack when it’s just getting started. In remote locations, this often…

A:

Q: I am driving down the street at 11.2 mi/h and suddenly I see a squirrel. I slam on the brakes in…

A:

Q: An object with mass m1 = 2m which moves on horizontal surface with constant speed v, collides with…

A: first mass = 2m second mass =  3m initial speed of first mass = v using conservation of momentum 2mv…

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

A: 1850 NExplanation:

Q: A mass M1 (of 2.5 kg) slides without friction on a table at a speed of 5 m/sec towards a mass M2 of…

A: M1 = 2.5 kg v = 5 m/s M2 = 5 kg k = 100 N/m

Q: A mass m starts at rest and then falls down distance l, where it contacts an unstressed spring of…

A: Total distance falls by the mass = h = l+l2 = 3l2 Displacement of the spring = x = l2 Using the…

Q: On a flat, frictionless table, two blocks (B1 of mass 2.00 kg and B2 of mass 3.00 kg) are pressed…

A: The mass of the block B1, The mass of block B2, The elastic potential energy of the spring,

Q: A light spring of force constant 4.00 N/m is compressed by 8.00 cm and held between a 0.250 kg block…

A:

Q: Gayle runs at a speed of 4.55 m/s and dives on a sled, initially at rest on the top of a…

A: Let  m = sled mass M = Gayle's mass M' = brother's mass u = initial velocity of Gayle V = final…