Consider a system of two particles in the xy plane: m1 = 2.00 kg is at the location
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Chapter 9 Solutions
PHYSICS:F/SCI.+ENGRS.(LL)-W/WEBASSIGN
- A man (weighing 915 N) stands on a long railroad flatcar (weighing 2415 N) as it rolls at 18.2 m/s in the positive direction of an x axis, with negligible friction.Then the man runs along the flatcar in the negative x direction at 4.00 m/s relative to the flatcar. What is the resulting increase in the speed of the flatcar?arrow_forwardIn a car crash, a Volvo of mass 1.85 x 104 kg collides with a stationary truck of mass 2.20 x 104 kg at a speed of u = 20.0 ms-1. Filling the crash, they connect and move at the same speed. There is no friction but the train driver blows a whistle (length = 0.480 m) which is open at one end and closed at the other and travels at a speed in air of 343 ms-1. If an observer stood nearby on a bridge above hears the whistle as the train approaches at 40.0 ms-1: 1. Demonstrate how the whistle frequency perceived by the observer is 13.2% greater than the frequency perceived by the driver. 2. Describe how the sound of the whistle heard by the observer will change as the train approaches and goes past the bridgearrow_forwardThe mass of particle 1 is 11kg. The initial velocity for particle 1 is (-104m/s)i + (216m/s)j. F21 = Fxe^-(t/T) + Fysin(2pit/T). Only need help finding the displacement of particle 1 in the x and y directions.arrow_forward
- A small ball of mass mb = 0.050 kg is projected into a pendulum of mass Mp = 0.200 kg in a ballistic pendulum experiment. How fast does the ball need to go in order to get the pendulum to swing up to a height of h = 0.25 m above its original position? 2.21 m/s 0.111 m/s 11.1 m/s 0.553 m/sarrow_forwardA pendulum of length L = 1.0 meter and bob of mass m = 1.0 kg is released from rest at an angle θ = 30 degrees. When the pendulum reaches the vertical position, the bob strikes a cube with mass M = 3.0 kg that is resting on a frictionless table of height h = 0.85 m. d. Determine how far away from the bottom edge of the table, Δx, the cube will strike the floor e. At the location where the cube would have struck the floor, there is now a small cart of mass M = 3.0 kg and negligible height. The cube lands on the cart, and sticks to the cart in a completely *inelastic* collision. Ignore friction. Calculate the horizontal velocity of the cart just after the cube lands on it.arrow_forwardConsider a system of two particles in the xy plane: m1 = 2.00 kgis at the location r→1 = (1.00î + 2.00ĵ)m and has a velocity of (3.00î + 0.500ĵ)m/s; m2 = 3.00 kg is at r→2 = (-4.00î - 3.00ĵ)m and has velocity (3.00î- 2.00ĵ) m/s. (a) Plot these particles on a grid or graph paper. Draw their position vectors and show their velocities. (b) Find the position of the center of mass of the system and mark it on the grid. (c) Determine the velocity of the center of mass and also show it on the diagram. (d) What is the total linear momentum of the system?arrow_forward
- Asap plxxxxxarrow_forwardA 5.00-kg block is moving at 5.00 m/s along a horizontal frictionless surface toward an ideal massless spring that is attached to a wall. After the block collides with the spring, it keeps moving rightwards until the spring reaches its maximum compression of 1.68 m. After reaching maximum compression, the block and spring come to rest momentarily, and then move leftwards. While it is moving to the left, what is the speed of the block when it has moved so that the spring is compressed to only one-half of the maximum distance?arrow_forwardAn object with mass m1 = 1kg moving to the right at a speed of 4m / s collides with a spring attached to a second block of mass m2 = 2kg moving left at 2m / s on a horizontal plane without friction as shown in the figure. The force constant of the spring is 105N / m and find the compression amount of the spring when the mass m1 moves at a speed of 3m / s to the right.arrow_forward
- Calculate the kinetic energies (in J) of the following. (a) a 2,001.0 kg automobile moving at 130.0 km/h J (b) an 83 kg runner sprinting at 13 m/s J (c) a 9.1 ✕ 10−31 kg electron moving at 2.1 ✕ 107 m/s Jarrow_forwardQ.9arrow_forwardA 5.27-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.40 m/s and its y component of velocity is -3.15 m/s. (a) What is the kinetic energy of the object at this time? 102.93 (b) At a later time t = 2.00 s, the particle is located at x = 8.50 m and y = 5.00 m. What constant force acted on the object during this time interval? 6.96 X magnitude Your response differs from the correct answer by more than 10%. Double check your calculations. N º measured from the +x axis direction (c) What is the speed of the particle at t = 2.00 s? m/s Additional Materials eBookarrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning