1. A 60. g golf ball leaves the face of a golf club with a velocity of 75 m/s. If the club exerted an average force of 3.0 x 104 N, what was the time of impact between the club and the ball?
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- 43. Three 200-g objects have velocities given by v 15.0 m/s, v₂ = 6.71-3.45j m/s, and 3 = -6.71 - 4.32j m/s. Find the kinetic energy of the center of mass and the internal kinetic energy of this system. =6.A 93.5 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 43.0 m/s. If both are initially at rest and if the ice is frictionless, how far does the player recoil in the time it takes the puck to reach the goal 17.0 m away?9.Mary slides down a snow-covered hill on a large piece of cardboard and then slides across a frozen pond at a constant velocity of 2.70 m/s. After Mary has reached the bottom of the hill and is sliding across the ice, Sue runs after her at a velocity of 4.30 m/s and hops on the cardboard. How fast do the two of them slide across the ice together on the cardboard? Mary's mass is 69.0 kg and Sue's is 60.0 kg. Ignore the mass of the cardboard and any friction between the cardboard and the snow and/or ice. (Indicate the direction with the sign of your answer.)
- 10. An explosion breaks a 34.0-kg object initially at rest into three parts. Part (1) has a mass mı = velocity of 52.0 m/s due west. Part (2) has a mass m2 magnitude of the velocity of part (3)? m/s 5.20-kg and a velocity of 79.0 m/s due north. What is the f60 s 3.80-kg and a 60 ssf6 60 sSCanon and Lucas are playing beach volleyball. Canon spikes the 240 g ball toward Lucas at 8.5 m/s. Lucas deflects the ball by hitting it with -87.5 N of impact force for a 0.006 s impact. Assuming only one dimension of motion, what is the magnitude of the velocity of the ball after it is hit by Lucas?