Part C Three objects lie along the x-axis. A 3.00 kg object is at the origin, a 2.00 kg object is at x = 1.50 m, and a 1.20 kg object is at an unknown position. The center of mass of the system of three objects is at x = -0.200 m. What is the position of the 1.20 kg object? Express your answer with the appropriate units. Di μA ? €1.20 kg = Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part D You hold a 0.125 kg glider A and a 0.500 kg glider B at rest on an air track with a compressed spring of negligible mass between them. When you release the gliders, the spring pushes them apart so that they move in opposite directions. When glider A has moved 0.960 m to the left from its starting position, how far to the right from its starting position has glider B moved? Express your answer with the appropriate units. μA 3 ? dB = Value Units Submit VP 8.14.3 Request Answer

A small car has a head-on collision with a large truck. Which of the following statements concerning the magnitude of the average force due to the collision is correct? O The small car experiences the greater average force magnitude. The small car and the truck experience the same average force magnitude. O The truck experiences the greater average force magnitude. It is impossible to tell since the masses are not given. It is impossible to tell since the velocities are not given. L _

John's mass is 94.7 kg, and Barbara's is 54.8 kg. He is standing on the x axis at xj = +9.14 m, while she is standing on the x axis at x³ = +2.05 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch? Distance moved by center of mass = i

1. A carnival ride consists of a hollow cylinder spinning about a vertical axis. As the cylinder spins with a speed vo, a person of mass M rides the inside wall of the cylinder without slipping down (there is no floor). The distance of the center of mass of the person from the axis of the cylinder is R. a. Draw the free body diagram of forces acting on the person during the ride. Show your choice for the +x and +y directions. b. Write out Newton's 2nd law in the x and y directions. Set the RHS of the equations to zero or Mv²/R or –Mv²/R. X: y: c. What is the normal force? d. What is the magnitude and direction of the friction force that the wall exerts on the rider? e. What is the magnitude and direction of the friction force the rider exerts on the wall? f. The coefficient of static friction between the wall and the rider is µg. What is the minimum speed that the rider can move without slipping down the wall?

A1

The parking brake on a 1000 kg Cadillac has failed, and it is rolling slowly, at 1 mph, toward a group of small children. Seeing the situation, you realize you have just enough time to drive your 2000 kg Volkswagen head-on into the Cadillac and save the children. Part A With what speed should you impact the Cadillac to bring it to a halt? Express your answer in miles per hour. V= ΕΙ ΑΣΦ ? mph

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 48

A system composed of the following particles: a 0.500 kg particle at the origin; a 1.25 kgkg particle at x = 0.150 mm, y = 0.200 mm; and a 0.750 kg particle at x = 0.200 mm, y = -0.800 mm. a.  Find the x-coordinate of the center of mass of the system. b. Find the y-coordinate of the center of mass of the system.

if a stationary 3.2 obect explodes so that: a. one part that is 1.5 kg goes left with 2.6 m/s , what is the mass and velocity of the other part? b. One part that is 1.0 kg goes North at 3.4 m/s and one part that is 1.2 kg goes West at 3.0 m/s, what is the mass and velocity of the third part?

A person's center of mass is easily found by having the person lie on a reaction board. A horizontal, 3.0-m-long, 6.2 kg reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A 61 kg woman lies on the reaction board with her feet over the pivot. The scale reads 20 kg. Part A What is the distance from the woman's feet to her center of mass? Express your answer to two significant figures and include the appropriate units. d = ¹ μA Value 2 Units ?