• (1998) A jet of water flowing with a velocity of 20 ms-1 from a pipe of cross-sectional area, 5.0 x 10-3 m² , strikes a wall at right angles and loses all its velocity. - What is the mass of water striking the wall per second? What is the change in momentum per second of the water hitting the wall? What is the force exerted on the wall?
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- What is the relationship between saying conserved quantity and inelastic collision of two objects, as if the latter circumscribes the result, conserved quantity, if at all? Momentum, kinetic energy, neither, both. I don’t understand the relevant concepts.Can any real collision ever be truly perfectly elastic? Why or why not? (You should think about this in two ways: first consider what effects of the environment surrounding the collision might have on energy and momentum conservation; second, consider the objects themselves – how must an object react to a collision in order to be considered "perfect"?).A uniform soda can of mass 0.141 kg is 12.1 cm tall and filled with 0.351 kg of soda (figure below). Then small holes are drilled in the top and bottom (with negligible loss of metal) to drain the soda. (Initially the soda can is full.) (a) What is the height h of the com of the can and contents initially? cm (b) What is the height h of the com of the can and contents after the can loses all the soda? cm (c) What happens to h as the soda drains out? O decreases then rises again decreases to the bottom O rises to the top O stays the same (d) If x is the height of the remaining soda at any give instant, find x when the com reaches its lowest point. cm Splash!
- If the truck and car in exercise 67 lock bumpers and stick together, what is their speed immediately after the collision? Reference: A 1200kg car traveling north at 14 m/s is rear-ended by a 2000 kg truck traveling at 25 m/s. What is the total momentum before and after the collision? Source: Physics: A Conceptual World View; 7th Edition. Chapter 6: Momentum, Exercise Question#68, in relation to question #67• A 732-kg car stopped at an intersection is rear-ended by a 1720-kgtruck moving with a speed of 15.5 m>s. If the car was in neutraland its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision28. • A cart of mass m moves with a speed v on a frictionless air track and collides with an identical cart that is stationary. If the two carts stick together after the collision, what is the final ki- netic energy of the system?
- Calculate for the % difference between the initial and final kinetic energies of the total/whole system for the following: v) Set-up 5: Trial 1, Trial 2 and Trial 3Let's assume a perfectly elastic collision between a golf club (mass of 250 gr) and a golf ball (mass of 46 gr). If the club hits the ball at a speed of 45 m/sec what will be the speed of the ball after the impact? What happens if the mass of the club is doubled?ball 1 (1kg) moves at 1m/s strikes stationary ball 2 (1kg). Ball 1 stops, ball 2 moves away at 1m/s. Is momentum,KE, or both coversed? Explain. Is this elasic collision or inelastic collison?
- Block "P" of mass Mp slides along an x-axis on a frictionless floor with initial speed Vp,i = 4 m/s. Then it undergoes a one-dimensional collision with stationary block "S" of mass Ms = 0.5 Mp. Next, block "S" undergoes a one dimensional collision with stationary block "U" of mass Mu= 0.5 Ms. Assume that kinetic energy is conserved in each collision. P S ४If you throw a ball horizontally while standing on roller skates, you roll backward with a momentum that matches that of the ball. Will you roll backward if you go through the motions of throwing the ball, but instead hold on to it? Explain.Squids rely on jet propulsion when a rapid escape is necessary, providedthey have filled their mantle with water prior to escape. An empty 1.5kg squid initially drifting at 1.6m/s pulls in 0.10kg of water in its mantle, then ejects this water at a remarkable 45m/s. How fast is this squid moving right after filling up with water?