A 2.7-kg cart is rolling along a frictionless, horizontal track towards a 1.8-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 +4.1 m/s, and the second cart's velocity is-2.5 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? (a) Number (b) Number I Units Units

Question 5: Balls A and B have a mass of 600 g and 1 kg, respectively. If they are sliding on a smooth horizontal plane with the velocities shown, determine their speeds just after impact. The coefficient of restitution between them is e = 0.8. DA= 6 m/s 40° 50° B Ug = 4 m/s

A 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 2.4-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 +4.0 m/s, and the second cart's velocity is -2.5 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? (a) Number (b) Number i Units Units

Your mass is 63.2 kg, and the sled s mass is 21.7 kg. You start at rest, and then you jump off the sled, after which the empty sled is traveling at a speed of 4.27 m/s. What will be your speed on the ice after jumping off?     1.47 m/s     0.88 m/s     2.06 m/s     1.77 m/s

A 67.9 g block hits a 140 g block initially at rest on a horizontal surface. After impact, they stick together and slide 9.22 m before coming to rest. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between blocks and surface is 0.34, what was the speed of the first block immediately before impact?

On a horizontal frictionless table, masses A and B (3 kg, 5 kg) slide to the right and left, respectively. They have speeds of 3 m/s and 1 m/s, respectively. The two masses collide, and bounce off each other. After the collision, they travel in opposite directions at speeds of 1.5 m/s and 1.700 m/s, respectively. (Note:In this problem, please use + dir = right, - dir = left, to indicate direction.) a.) Calculate A's momentum: before collision: kg-m/s after collision: kg-m/s Make sure you understand why it is NOT conserved. b.) Calculate B's momentum: before collision: kg-m/s after collision: kg-m/s Make sure you understand why it is NOT conserved. c.) Calculate the A+B system's momentum: before collision: kg-m/s after collision: kg-m/s Make sure you understand why it IS conserved. d.) Calculate the kinetic energy of the A+B system: before collision: after collision: J What kind of collision is this v ---Select--- elastic somewhat inelastic Submit Answer completely inelastic

Your mass is 92.6 kg, and the sled s mass is 17.1 kg. You start at rest, and then you jump off the sled, after which the empty sled is traveling at a speed of 3.11 m/s. What will be your speed on the ice after jumping off? 0.57 m/s 0.46 m/s 1.03 m/s 0.80 m/s

A cosmic ray muon with mass  mμ = 1.88 ✕ 10−28 kg  impacting the Earth's atmosphere slows down in proportion to the amount of matter it passes through. One such particle, initially traveling at 2.42 ✕ 106 m/s in a straight line, decreases in speed to 1.60 ✕ 106 m/s over a distance of 1.10 km. (a) What is the magnitude of the force experienced by the muon? N(b) How does this force compare to the weight of the muon? |F| Fg  =