Xena (Warrior Princess, mass 65 kg) swings from a rope at an armored villain (mass 100 kg) and delivers her trademark two-footed flying kick to his breast plate, knocking him backwards. The collision brings her to a stop and she lands on her feet. Neglecting friction and measuring speeds just before and after the collision, we can expect that, to a high degree of accuracy: Kinetic energy is conserved O Neither momentum nor kinetic energy are conserved. Both momentum and kinetic energy are conserved O Momentum is conserved
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- Quesitos: The drawing shows a bullet passing through two blocks that rest on a horizontal, frictionless surface. Rule out air resistance. The bullet completely passes through the first block and is buried in the second block. Notice that after the collision, both blocks move. Can the Conservation Principle be applied from Linear Momentum to this three-body system? Justify your answer (Ignore any loss of mass from the first block). Problem: A 4.00-g bullet moves horizontally with velocity of + 355m / s. The mass of the first block is 1150 g, and its velocity after the bullet passes through it it is +0.550 m / s. The mass of the second block is 1530 g. (a) Obtain the speed of the bullet after passing through the first block, (b) obtain the velocity of the second block after the bullet is buried in itConsider the two pucks shown in the figure. As they move towards each other, the momentum of each puck is equal in magnitude and opposite in direction. Given that v areen = 12.0 m/s, and mblue is 25.0% greater than m, final speeds of each puck (in m/s), if - the kinetic energy of the system is converted to internal energy? 'green what are the 2 30.0° 30.0 11.225 write the initial momentum of the system to find the blue puck's initial velocity, noting that because the initial Vgreen momenta of the two pucks are equal in magnitude and opposite in direction, they sum to zero. Use the relationship that m, = 1.25 m,. Then, write expressions for the initial and final kinetic energies of the system, set - the initial kinetic energy equal to the final kinetic energy, and solve the initial momentum and final kinetic energy equations for the final speeds. m/s 8.98 Write the initial momentum of the system to find the blue puck's initial velocity, noting that because the initial momenta of the two…4. In a perfectly inelastic collision, two objects collide and stick together. Is momentum conserved in the collision? Is energy conserved? Why or why not?
- Mechanic Physics: Please make sure this is right In the figure, a ball of mass m = 56 g is shot with speed vi = 23 m/s (in the negative direction of an x axis) into the barrel of a spring gun of mass M = 263 ginitially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. Assume that the increase in thermal energy due to friction between the ball and the barrel is negligible. (a) What is the speed of the spring gun after the ball stops in the barrel? (b)What fraction of the initial kinetic energy of the ball is stored in the spring?A sprinter with a mass of 79 kg reaches a speed of 8 m/s during a race. Find the sprinter's linear momentum (in kg • m/s). (Enter the magnitude.) kg • m/sMike then takes his now 1175 kg car and crashes it at 50 m/s into the back of a 1600 kg Jeep traveling at 10 m/s. They roll off together going 18 m/s. How much work was done by the crumple zone of Mike’s car? Just a short simple answer will suffice.
- Is the following statement true? If not, why? Within the system, both the momentum and kinetic energy are conserved during each of the collisions ( spring-loaded elastic, hoop spring, and putty collisions).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?a 600 gram banana sliding north on a frictionless table at 2.5 meters per second bounces of a 400 gram kiwi fruit that is initially at rest , after colliding the banana continues moving north at 0.5 meters per second. At the North edge of the track is a frictionless inclined ramp which the kiwi fruit slides up to then the kiwi comes back down the ramp , without losing energy , and will now be moving south , the kiwi will catch up and hit the banana again. How much momentum did the kiwi have just before the sticky collision ? how much just after ? how much did the kiwis momentum change ?
- Doing some physics homework and am kind of stumped here!Consider the head-on collision of two identical bowling balls, each with mass 5 kg (see figure). Ball A with velocity v = m/s strikes ball B, which was at rest. Then ball A stops and ball B moves with the same velocity v that ball A had initially. M M В Initially at rest Initial state (before collision) Final state (after collision) M M B Now at rest (a) Choose a system consisting only of ball A. What is the momentum change of the system during the collision? Apsystem = kg • m/s What is the momentum change of the surroundings? Apsurroundings = kg • m/s (b) Choose a system consisting only of ball B. What is the momentum change of the system during the collision? Apsystem = kg · m/s What is the momentum change of the surroundings? Apsurroundings = kg · m/s (c) Choose a system consisting of both balls. What is the momentum change of the system during the collision? APsystem = kg · m/s What is the momentum change of the surroundings? Apsurroundings = kg • m/sA 0.500 kg block of cheese sliding on a frictionless tabletop collides with and sticks to a 0.200 kg apple. Before the collision the cheese was moving at 1.40 m/s and the apple was at rest. The cheese and apple then slide together off the edge of the table and fall to the floor 0.600 m below. (a) Find the speed of the cheese and apple just after the collision. In this collision, what is conserved: momentum, total mechanical energy, both, or neither? (b) What is the speed of the cheese and apple just before they hit the floor? During the fall from the tabletop to the floor, what is conserved: momentum, total mechanical energy, both, or neither?