PHYS 1111 Intro Physics I Mechanics Nguyen Spring 2015 Homework 08 Daniel Hernandez Due date Fri Mar 27 11 58 59 pm 2015 EDT Object A has a mass of i m i object B has a mass of i m i 4 and object C has a mass of 2 i m i If all three objects have the same momentum rank them in order of increasing kinetic energy 3 B 2 A 1 C You are correct Your receipt no is 156 1676 For the same three masses as before now assume that the objects have the same kinetic energy and rank them in order of increasing momentum 3 C 1 B 2 A You are correct Your receipt no is 156 4642 Choose whether each of the following statements is true or false T F T F F Choices True False A system of particles with zero kinetic energy must also have zero momentum A system of particles with zero momentum must also have zero kinetic energy It is possible for two isolated objects to collide so that all the initial kinetic energy of the system is lost An object at rest on a slick surface is struck by a second object After the collision both objects must be moving Two cars collide at an intersection but do not stick together after the collision Therefore the collision was elastic 1 20 kg Frictionless 1 80 kg a v1 v2 b hrwc9p49 A 4 10 g bullet is fired horizontally at two blocks resting on a smooth tabletop as shown in the top figure The bullet passes through the first block with mass 1 20 kg and embeds itself in the second with mass 1 80 kg Speeds of 0 310 m s and 0 83 m s respectively are thereby imparted to the blocks as shown in the bottom figure Neglecting the mass removed from the first block by the bullet find the speed of the bullet immediately after it emerges from the first block 365 m s You are correct Your receipt no is 156 8353 Find the bullet s original speed 456 m s You are correct Your receipt no is 156 7802 An artillery shell of mass 10 00 kg lying at rest on the ground accidentally detonates exploding into three pieces of shrapnel One piece of mass 2 80 kg is flung in the x direction at 22 0 m s while a second piece of mass 3 00 kg is propelled in the y direction at 17 9 m s Determine the angle at which the remaining piece of shrapnel travels relative to the x axis 41 08 deg You are correct Your receipt no is 156 1540 You are correct Your receipt no is 156 6305 Calculate the speed of the third piece of shrapnel 19 46 m s You are correct Your receipt no is 156 863 A 0 465 kg block of wood hangs from the ceiling by a string and a 0 0719 kg wad of putty is thrown straight upward striking the bottom of the block with a speed of 5 76 m s The wad of putty sticks to the block How high does the puttyblock system rise above the original position of the block 0 0303 m You are correct Your receipt no is 156 586 PHYS 1111 Intro Physics I Mechanics Nguyen Spring 2015 Homework 08 Daniel Hernandez c6p59 A small block of mass m1 0 8 kg is released from rest at the top of a curved wedge of mass 7 0 kg which sits on a frictionless horizontal surface as in Figure P6 59a When the block leaves the wedge its velocity is measured to be 3 8 m s to the right as in Figure P6 59b a What is the velocity of the wedge after the block reaches the horizontal surface 0 434 m s You are correct Your receipt no is 156 3887 b What is the height h of the wedge 0 82 m You are correct Your receipt no is 156 1684 Printed from LON CAPA MSU Licensed under GNU General Public License
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