78. ..An open rail car of initial mass 10,000 kg is moving at 5.00 m/s when rocks begin to fall into it from a conveyor belt. The rate at which the mass of rocks increases is 500 kg/s. Find the speed of the train car after rocks have fallen into the car for a total of 3.00 s. Example 7-2

78. ..An open rail car of initial mass 10,000 kg is moving at 5.00 m/s when rocks begin to fall into it from a conveyor belt. The rate at which the mass of rocks increases is 500 kg/s. Find the speed of the train car after rocks have fallen into the car for a total of 3.00 s. Example 7-2

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)...

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8
In a game of pool the cue ball is moving with an initial velocity of 4 m/s when it collides elastically with the 8 ball initially at rest. The cue ball moves off at an angle of 30 degrees with respect to it original direction after the collision and the 8 ball moves off at an angle of 60 degrees with respect to the original direction. If the two balls have the same mass find the final speed of both balls after the collision.
space a kg, including suit and oxygen tank. The tether line securing the astronaut to their spacecraft loses its attachment from the spacecraft while they are on a spacewalk. The astronaut is initially at rest with respect to the spacecraft, they then throw their 12.0 kg oxygen tank away from their spacecraft with a speed of 8.00 m/s in order to propel themselves back towards it. I) Calculate the maximum distance they can possibly be from the spacecraft and still return within 2.00 min (the amount of time the air in their helmet remains breathable). II) Which of Newton's law of motion explain best why this strategy works? (a) First (b) Second (c) Third
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A 2.64-kg steel ball strikes a massive wall at 10.0 m/s at an angle of 0 - 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is In contact with the wall for 0.164 s, what is the average force exerted by the wall on the ball? magnitude direction --Select- v
13) A 14.2 kg sheep dog is running to the right at 1.78 m/s. A 10.7 kg collie is running to the left at 2.14 m/s. If the dogs collide head-on in a perfectly elastic collision, what is the final velocity of the collie after the collision? A) 4.43 m/s B) 2.34 m/s C) 1.73 m/s D) 1.27 m/s E) 2.08 m/s
9-5 Elastic Collisions in One Dimension Example 9-7: Equal masses. Billiard ball A of mass m moving with speed v, collides head-on with ball B of equal VA mass. What are the speeds of the two balls after the collision, assuming it is elastic? Assume (a) both balls are moving initially (va and vg), (b) ball B is initially at rest (vg = 0).
QUESTION 8 Two carts of masses m1 and m2 are moving towards each other with speeds v1 and v2. respectively. The carts collide head-on, elastically. For the values listed below, total kineti energy of the two carts after the collision, in joules, is: m1 = 6.00 kg m2 = 3.51 kg 1 = 2.18 m/s 2 = 7.00 m/s
Question 3 A 6000 kg truck moving with a velocity of (11.26, 10.00) m/s collides with a 2500 kg car mdving at (-18.52, -19.95) m/s. After the collision the two vehicles are stuck together. What is their velocity just after the collision. (338) A) O(2.50, 1.19) m/s B) O(-9.76, -11.14) m/s C) O(1.19, 2.50) m/s D) O(13.40, 12.93) m/s E) O(-7.26, -9.95) m/s
9-7 Collisions in Two or Three Dimensions Example 9-13: Proton-proton collision. A proton traveling with speed 8.2 x 105 m/s collides elastically with a stationary proton in a hydrogen target. One of the protons is observed to be scattered at a 60° angle. At what angle will the second proton be observed, and what will be the velocities of the two protons after the collision? mA PA mA PA P'B mB