1. Two football players collide head-on while trying to catch a thrown football. The first player is 95.0 kg and has an initial velocity of 6.00 m/s, while the second player is 115 kg and has an initial velocity of -3.50 m/s. What is their velocity just after impact if they cling together? How much kinetic energy is lost in the collision? If the collision time is 0.33 seconds, what is the magnitude of the force each player exerts on the other player?
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- d. v.> V, > V. v.> V, = V e. %3D 4. A 3.54 kg thin plate is hanging at rest from a massless wire when it is struck by a 10.0 g bullet travelling to the right at 320 m/s. After the collision the bullet instantly comes out the other side of the plate at 42 m/s. How high does the plate swing up in the y-axis.8. A hockey puck of mass 0.37 kg is shot east at 2.10 m/s strikes a second puck, initially at rest, of mass 0.54 kg. As a result of the collision, the first puck is deflected at an angle of 35° north of east, with a speed of 1.45 m/s. What is the angle made between the direction of the second puck and the east direction after the collision? X 317.86 O4. A 0.060 kg ball hits a wall with an initial speed of 30 m/s in the -x direction and bounces off with the same speed in the +x direction. The graph shows the force of the wall on the ball during the interaction. a) Draw the ball and the wall just before and just after the collision. b) What is the impulse of the force of the wall on the ball? b) What is the maximum value of the contact force Fmax between the wall and the ball? Fmax t (ms) 6 4.
- A 3.0 kg object traveling 6.0 m / s east has a perfectly elastic collision with a 4.0 kg object traveling 8.0 m / s west. After the collision, the 3.0 kg object will travel 10.0 m / s to the west. a) What is the total moment before the collision? b) What is the total momentum of these objects after this collision?I. A lump of clay (m = 3.01 kg) is thrown towards a wall at speed v = 3.15 m/s. The lump sticks to the wall. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. II. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.15 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. III. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.24 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic…As part of a carnival game, a ?b=0.628 kgmb=0.628 kg ball is thrown at a stack of 17.8 cm17.8 cm tall, ?o=0.363 kgmo=0.363 kg objects and hits with a perfectly horizontal velocity of ?b,i=11.3 m/s.vb,i=11.3 m/s. Suppose that the ball strikes the topmost object. Immediately after the collision, the ball has a horizontal velocity of ?b,f=3.60 m/svb,f=3.60 m/s in the same direction, the topmost object has an angular velocity of ?o=3.23 rad/sωo=3.23 rad/s about its center of mass, and all the remaining objects are undisturbed. Assume that the ball is not rotating and that the effect of the torque due to gravity during the collision is negligible. If the object's center of mass is located ?=12.5 cmr=12.5 cm below the point where the ball hits, what is the moment of inertia ?oIo of the object about its center of mass?