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A 3.0-kg cart is rolling along a frictionless, horizontal track towards a 1.3-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts collide, the first cart's velocity is +3.4 m/s, and the second cart's velocity is -1.4 m/s.
(a) What is the total momentum of the system of the two carts at this instant?
(b) What was the velocity of the first cart when the second cart was still at rest?
How many elections Paris would we have to remove before the electrostatic repulsion between the earth and moon would go over their gravitational attraction.
The angle is 40 degrees and the length is 7.50 m, If the seat weighs 205 N and a 866-N person is sitting in it, find the tension in the inclined cable
A father racing his son has 1/3 the kinetic energy of the son, who has 1/3 the mass of the father. What are the original speeds ofthe father
A 200 kg rocket sled can be accelerated at a constant rate from rest to 1600 km/h in 2.0 s. What is the magnitude of the required net force
Car A accelerates from 0 mph to 30 mph in 6 seconds. Car B accelerates from 0 mph to 35 mph in 6.5 seconds
A rifle with a weight of 35 N fires a 5.0-g bullet with a speed of 250 m/s, If a 675-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle
starting from rest, a 4.1 kg block slides 2.00 m down a rough 30 degree incline. The coefficient of kinetic friction between the block and the incline is uk= 0.436, determine the work done by the normal force
A grocery sack can withstand a maximum of 310 N before it rips. Will a bag holding 20.0 kg or groceries that is lifted from the checkout counter at an acceleration of 5.5 hold?
Two balls are on a frictionless horizontal tabletop. Ball X initially moves at 10 meters per second, which angle and at what velocity will ball y move
A metal rod with a diameter of 2.30 cm and length of 1.10 m has one end immersed in ice at 32oF, what is the thermal conductivity of this metal and Identify the metal
You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. What should be the diameter of the pipe under the platform
A 74 trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0 m/s. How can I find how much he depresses it if there is a spring constant of 6.2*10^4.
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