Constants An iron block with mass ma slides down a frictionless hill of height H. At the base of the hill, it collides with and sticks to a magnet with mass mu- • Part A What is the speed e of the block and magnet immediately after the collision? > View Available Hints) O v- ( ) V29H O v= () V2GH O v= () v2gH O v= (m) 29H O v= () 2gH Submit • Part B Now assume that the two masses continue to move at the speed t trom Part A until they encounter a rough surface. The coeficient of friction between the masses and the surface is u. IH the blocks come to rest after a distance s, which of the following eguations would you use to find a? > View Available ints) () aH = umags o gH = umugs o () 9H = p(mp+ mx)gs o ) 9H = -H(ms+ mM)gs o ) gH = p(mp+ mu)9 Submit

Constants An iron block with mass ma slides down a frictionless hill of height H. At the base of the hill, it collides with and sticks to a magnet with mass mu- • Part A What is the speed e of the block and magnet immediately after the collision? > View Available Hints) O v- ( ) V29H O v= () V2GH O v= () v2gH O v= (m) 29H O v= () 2gH Submit • Part B Now assume that the two masses continue to move at the speed t trom Part A until they encounter a rough surface. The coeficient of friction between the masses and the surface is u. IH the blocks come to rest after a distance s, which of the following eguations would you use to find a? > View Available ints) () aH = umags o gH = umugs o () 9H = p(mp+ mx)gs o ) 9H = -H(ms+ mM)gs o ) gH = p(mp+ mu)9 Submit

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter6: Momentum, Impulse, And Collisions

Section: Chapter Questions

Problem 10CQ: Two cans move in the same direction along a frictionless air track, each acted on by the same...

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Two blocks collide on a frictionless surface. After the collision, the blocks stick together. Block A has a mass M and is initially moving to the right at speed v. Block B has a mass 2M and is initially at rest. System C is composed of both blocks, (a) Draw a force diagram for each block at an instant during the collision, (b) Rank the magnitudes of the horizontal forces in your diagram. Explain your reasoning, (c) Calculate the change in momentum of block A, block B, and system C. (d) Is kinetic energy conserved in this collision? Explain your answer. (This problem is courtesy of Edward F. Redish. For more such problems, visit http://www.physics.umd.edu/perg.)
Professional Application The Moon's craters are remnants of meteorite collisions. Suppose a fairly large asteroid that has a mass of 5.001012 kg (about a kilometer across) strikes the Moon ata speed of 15.0 km/s. (a) At what speed does the Moon recoil after the perfectly inelastic collision (the mass of the Moon is 7.361022 kg) ? (b) How much kinetic energy is lost in the collision? Such an event may have been observed by medieval English monks who reported observing a red glow and subsequent haze about the Moon. (c) In October 2009, NASA crashed a rocket into the Moon, and analyzed the plume produced by the impact. (Significant amounts of water were detected.) Answer part (a) and (b) for this real-life experiment. The mass of the rocket was 2000 kg and its speed upon impact was 9000 km/h. How does the plume produced alter these results?
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The figure below shows a bullet of mass 200 g traveling horizontally towards the east with speed 400 m/s, which strikes a block of mass 1.5 kg that is initially at rest on a frictionless table. After striking the block, the bullet is embedded in the block and the block and the bullet move together as one unit. a. What is the magnitude and direction of the velocity of the block/bullet combination immediately after the impact? b. What is the magnitude and direction of the impulse by the block on the bullet? c. What is the magnitude and direction of the impulse from the bullet on the block? d. If it took 3 ms for the bullet to change the speed from 400 m/s to the final speed after impact, what is the average force between the block and the bullet during this time?
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Figure P9.59a shows an overhead view of the configuration of two pucks of mass In on frictionless ice. The pucks are tied together with a string of length 1' and negligible mass. At time t = 0, a constant force of magnitude F begins to pull to the right on the center point of the string. At time t, the moving pucks strike each other and stick together. At this time, the force has moved through a distance 4 and the pucks have attained a speed v (Fig. P9.59b). (a) What is v in terms of F, d, e, and in? (b) How much of the energy transferred into the system by work done by the force has been transformed to internal energy?
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Two cans move in the same direction along a frictionless air track, each acted on by the same constant force for a time interval t. Cart 2 has twice the mass of cart 1. Which one of the following statements is true? (a) Each cart has the same change in momentum. (b) Cart 1 has the greater change in momentum. (c) Cart 2 has the greater change in momentum. (d) The changes in momenta depend on the initial velocities.