The principal of convservation of momentum O States that it is impossible to change the momentum of an object O Is valid for all collisions O Is valid only for perfectly elastic collisions O Is valid only if the net external force acting on the system is zero
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- The free-body diagrams in the figure below give, from overhead views, the horizontal forces acting on three boxes of chocolates as the boxes move over a frictionless confectioner's counter. For each box, is its linear momentum conserved along the x axis and the y axis? (a) 43 N 4 N 6 N 2N 72 N O only conserved along x axis O only conserved along y axis conserved along both x and y axes O not conserved along either axis (b) 8 N 60° 60° 8 N 3 N 2 N 5 N O only conserved along x axis O only conserved along y axis conserved along both x and y axes O not conserved along either axis (c) 6 N 60° 4 N 5 N 60° 6 N O only conserved along x axis O only conserved along y axis O conserved along both x and y axes O not conserved along either axis O O O OA 3.45 kg black ball traveling 4 m/s has a head on collision with a white one at rest. Using the velocities shown, calculate the mass of the white ball, Ignore friction and air resistance. 0 m/s 4 m/s 1.4 m/s 5.7 m/s(a) A car traveling due east strikes a car traveling due north at an intersection, and the two move together as a unit. A property owner on the southeast corner of the intersection claims that his fence was torn down in the collision. Should he be awarded damages by the insurance company? Defend your answer. (b) Let the eastward-moving car have a mass of 1 300 kg and a speed of 30.0 km/h and the northward-moving car a mass of 1 100 kg and a speed of 20.0 km/h. Find the velocity after the collision. Are the results consistent with your answer to part (a)?
- When two object collide in an isolated system, the forces that act on each object at the moment of collision are __________. Group of answer choices greater on the object with less initial momentum greater on the object traveling the slowest greater on the object traveling the fastest equal and opposite greater on the object with more initial momentum greater on the more massive object greater on the less massive objectA ball has a mass of 10-Kg and is traveling to the right at 30 m/s. A second ball, which is suspended from a string and has a mass of 15-Kg, is traveling to the left at 12 m/s. The two balls experience an elastic head-on collision when the string is vertical. Determine:a) the speed of each ball after impactb) the height that the second ball will rise with respect to its lowest position (AFTER IMPACT)Since a net force is equal to mass times acceleration, and a net force is also equal to the rate of change of momentum, then the rate of change of momentum must equal mass times acceleration. True False Consider a system of 2 objects, A and B. If the rate of change of momentum of the entire system (A and B together) is zero then The total momentum of the system must be zero. The total momentum of the system must be constant. The momentum of A must be constant, and the momentum of B must be constant. The total momentum of the system is conserved. the momentum of A must be zero, and the momentum of B must be zero. You don't have enough information to determine the momentum of A or the momentum of B.
- Particle A has mass m. Particle B has twice the mass of Particle A. The same constant force F acts on both particles for time At. Which particle has the larger momentum? O PA > PB O PA < PB O PA = PB O There is not enough information to tell.helpA car of mass m moving at a speed vi collides and couples with the back of a truck of mass 2m moving initially in the same direction as the car at a lower speed V2. (a) What is the speed vf of the two vehicles immediately after the collision? (Use any variable or symbol stated above as necessary.) Vf = (b) What is the change in kinetic energy of the car-truck system in the collision? (Use any variable or symbol stated above as necessary.) ΔΚΕ