1) A pendulum which is shown in the figure below is released from angle 60°. The mass of the object A is 30kg and the mass of the object B is 10kg. Find the ratio of the tension T1 in the massless rod before the completely elastic collision to the tension T2 just after the collision. T1 /T2 = ? A B
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- The three masses shown in (Figure 1) are connected by massless, rigid rods. Assume that m₁ = 180 g and m2 = 300 g. Figure A y 200 g 12 cm B m₂ 10 cm C m₁ -X 1 of 1 Part A What is the x-coordinate of the center of mass? Express your answer with the appropriate units. ► View Available Hint(s) x = Submit Part B Value y = μA What is the y-coordinate of the center of mass? Express your answer with the appropriate units. ► View Available Hint(s) Submit Value Provide Feedback μA Units ? Units ?*Two objects, m1 and m2, have an elastic collision. The initial velocity of m1 is +6.0 m/s and of m2 is +4.0m/s. After the collision, the velocity of m1 is +5.0m/s. What is the velocity of m2?The mass of the wire is 47 g and the length of the wire is 2.4 m. Determine the x-coordinate for the center of mass in meters. 1.Write an expression for the center of mass XCM of the wire about the x-axis. 2.Write an expression for the center of mass YCM of the wire about the y-axis. 3.the mass of the wire is 47 g and the length of the wire is 2.4 m. Determine the x-coordinate for the center of mass in meters.
- A child of mass 30kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and the speed is 9.8m/s. At this instant, the cord is 5.85m long. A) at this instant what is the magnitude of the rate of change of the child's momentum? B) at this instant what is the net force acting on the child? C) what is the magnitude of the force that the elastic cord exerts on the child? D) the relaxed length of the elastic cord is 5.78m. What is the stiffness of the cord?Determine location of the center of mass of steel sheet that is shaped as shown below. Give your answer in the form (xCM; YCM), where xCM and ycm are in cm, to one decimal place. у (ст) 3L 2L IL x (cm) IL 2L 3LA0.145-kg baseball pitched horizontally at 32.6 m/s strikes a bat and is popped straight up to a height of 51.9 m. Part A If the contact time is 3.00 ms, calculate the magnitude of the average force on the ball during the contact. Express your answer using two significant figures. N Submit Request Answer • Part B Calculate the direction of the average force on the ball during the contact. Express your answer using two significant figures. ? above horizontal Submit Request Answer • Previous ook Pro G Search or type URL %24 & 5 6 8 9 T U
- Follow-up Questions 2. Three uniform thin rods, each of length L, form an inverted U. The ogo vertical rods each have a mass of M: the horizontal rod has a mass of 3M. What are (a) the x coordinate and (b) the y coordinate of the system's center of mass? L. Part 48In a rail yard a freight train car moving at speed v strikes two identical cars at rest (see figure below). Neglecting any resistance to rolling, find the common velocity of the three-car system after coupling has been completed and any associated vibrations have died out. State you answer in terms of the leftmost car's velocity v. You can assume all three cars have equal mass.1.Your car rolls slowly in a parking lot and bangs into the metal base of a light pole. In terms of safety, is it better for your collision with the light pole to be elastic, inelastic, or is the safety risk the same for either case? Explain and labled the problem.