Two football players collide head-on in midair while trying to catch a thrown football and cling together. The first player is 96 kg and has an initial velocity of 9 m/s, while the second player is 111 kg and has an initial velocity of -2 m/s. Ignore air resistance and friction. (a) For the system consisting of the two football players, the total momentum is: Conserved Not conserved (b) This collision is: Elastic Completely inelastic (c) What is their velocity v just after impact if they cling together?

A cue ball at rest on a frictionless pool table is hit dead center by a pool stick, giving it an impulse of +1.85 N · s. The ball slides (the combination of hitting the ball dead center and no friction allows this to happen) along the table and makes a head-on elastic collision with another pool ball. If both pool balls have a mass of 0.156 kg, determine the velocity (in m/s) of the second ball the instant after the collision.

A block with mass m 1 =1 kg is released from rest on a frictionless track at a distance h1=2.5 m above the top of a table . it then collides elasticly with a block having same mass m2=1Kg that is at rest on the table. (a) What is the velocity of mass m1 just before collision? (b) What is the velocity of mass 2 just after collision?

Two objects of equal mass collide. Object A is initially moving with a velocity of 15 m/s in the +x-direction, and object B is initially at rest. After the collision, object A is at rest. There are no external forces acting on the system of two masses. (a) Use momentum conservation to deduce the velocity of object B after the collision. (b) Is this collision elastic? Justify your answer.

In a ballistic pendulum experiment, a small marble is fired into a cup attached to the end of a pendulum. If the mass of the marble is 0.0315 kg and the mass of the pendulum is 0.250 kg, how high ℎ will the pendulum swing if the marble has an initial speed of 5.65 m/s? Assume that the mass of the pendulum is concentrated at its end so that linear momentum is conserved during this collision.

Two identical balls are traveling toward each other with velocities of -3.7 m/s (ball A) and +6.3 m/s (ball B), and they experience an elastic head-on collision. Obtain the velocities (magnitude and direction) of (a) ball A and (b) ball B after the collision.

Two objects, both with a mass of 1.72 kg are sliding across a horizontal, frictionless surface toward each other. If mass 1 has an initial velocity of 4.17 m/s i  and mass 2 has an initial velocity of -2.08 m/s i, what is the change in total kinetic energy if they undergo a perfectly inelastic collision? Assume that total momentum is conserved.

A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axis. Just before the collision, one ball, of mass 3.9 kg, is moving upward at 23 m/s and the other ball, of mass 1.3 kg, is moving downward at 14 m/s. How high do the combined two balls of putty rise above the collision point? (Neglect air drag.)

One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other words, they stick together after the collision and move off with a common velocity. Momentum is conserved. The speed of the object that is moving initially is 22 m/s. The masses of the two objects are 3.1 and 7.1 kg. Determine the final speed of the two-object system after the collision for the case (a) when the large-mass object is the one moving initially and the case (b) when the small-mass object is the one moving initially. (a) Vf = i (b) vf= i

As shown in the figure, a billiard ball with mass m, is initially at rest on a horizontal, frictionless table. A second billiard ball with mass m, moving with a speed 2.00 m/s, collides with m,. Assume m, moves initially along the +x-axis. After the collision, m, moves with speed 1.00 m/s at an angle of 0 = 54.0° to the positive x-axis. (Assume m, = 0.200 kg and m, = 0.300 kg.) After the collision y sin e Before the collision Py cos e Va cos o y sin o (a) Determine the speed (in m/s) of the 0.300 kg ball after the collision. m/s (b) Find the fraction of kinetic energy transferred away or transformed to other forms of energy in the collision. JAK|