An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.99 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 3.31 s at the rate of 495 kg/s. What is the car's speed vf after the loading is completed? Ignore rolling friction. Uf = m/s

An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.99 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 3.31 s at the rate of 495 kg/s. What is the car's speed vf after the loading is completed? Ignore rolling friction. Uf = m/s

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Problem B2. A small box of mass m = 1.50 kg starts from rest and glides down a smooth, frictionless hill fromn a height h = 2.00 m to the base, where it meets a rough plank of mass M = 5.00 kg that is resting on the frictionless horizontal ground surface. Due to the friction between the box and the plank, its speed is reduced until, at a certain moment, it begins to move together with the plank as if they were a single object. Figure B2. Problem diagram B2 b) Find the speed with which the box and the plank move together.
Identical twins, each with mass 53.5 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless. Twin A is carrying a backpack of mass 12.0 kg. She throws it horizontally at 3.15 m/s to Twin B. Neglecting any gravity effects, what are the subsequent speeds of Twin A and Twin B?
A baseball has a mass of 0.140 kg, and it is pitched towards home plate at a speed of 48.0 m/s. Assume that the ball is pitched horizontally and that the ball is hit horizontally back in the opposite direction. If the bat exerts an average force of 9100 N for 2.80 ms, what is the final speed of the ball in m/s?
Two asteroids of equal mass collide in an ellastic collision. Asteroid A has an initial velocity of 40 m/s. After the collision, asteroid A deflects an an angle of 30° above its initial direction. Asteroid B is initially at rest. After the collision, asteroid B travels at 45° below the original direction of asteroid A. What are the final speeds of the two asteroids?
Two bumper cars at the county fair are sliding toward one another (see figure below). Initially, bumper car 1 is traveling to the east at 5.62 m/s, and bumper car 2 is traveling 60.0° south of west at 10.00 m/s. After they collide, bumper car 1 is observed to be traveling to the west with a speed of 3.10 m/s. Friction is negligible between the cars and the ground. E Car 2 60 10.00 m/s Car 1 5.62 m/s (a) If the masses of bumper cars 1 and 2 are 600 kg and 631 kg respectively, what is the velocity of bumper car 2 immediately after the collision? (Express your answer in vector form. Enter your answer to at least three significant figures.) m/s (b) What is the kinetic energy lost in the collision?
A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.490 m/s. The total mass of the sled, man, and rock is 94.0 kg. The mass of the rock is 0.270 kg and the man can throw it with a speed of 15.5 m/s. Both speeds are relative to the ground. Determine the speed of the sled (in m/s) if the man throws the rock forward (i.e., in the direction the sled is moving). m/s Determine the speed of the sled (in m/s) if the man throws the rock directly backward. m/s
A mine car, whose mass is m1 = 444 kg, rolls at a speed of v1 = 0.494 m/s on a horizontal track, as the drawing below shows. An m2 = 138 kg chunk of coal has a speed of v2 = 0.817 m/s when it leaves the chute. Assume θ = 23.7°. Determine the velocity of the car/coal system after the coal has come to rest in the car.
A 67.9 g block hits a 140 g block initially at rest on a horizontal surface. After impact, they stick together and slide 9.22 m before coming to rest. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between blocks and surface is 0.34, what was the speed of the first block immediately before impact?
Identical twins, each with mass 62.0 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless. Twin A is carrying a backpack of mass 12.0 kg. She throws it horizontally at 2.80 m/s to Twin B. Neglecting any gravity effects, what are the subsequent speeds of Twin A and Twin B? Twin A m/s Twin B m/s
A 0.450 kg hammer is moving horizontally at 8.00 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact in seconds. (Enter a number.) S (b) What was the average force in newtons exerted downward on the nail? (Enter a number.) N
7. A 730-N man stands in the center of a frozen pond of radius 5.00-m. There is no friction between the man's shoes and the ice, preventing him from walking off of the pond. The man then picks up a 1.20-kg rock lying beside him and throws it horizontally at a speed of 5.00-m/s. How long does it take the man to reach the edge of the pond? Answer: 61.7 s
An open train car, with a mass of 2050 kg, coasts along a horizontal track at the speed 2.792.79 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 2.792.79 s at the rate of 475 kg/s. What is the car's speed vf after the loading is completed? Ignore rolling friction.