Question Description
Please solve the following problems. You must show all work. Submit in aWord Doc.
#1. A rail car of mass 4500 kg is moving with a velocity of12.4 m/s collides with a stationary rail car of mass 6700 kg. What is thevelocity of the two cars if they stick after they collide?
#2. A tennis player hits a 1.45 kg tennis ball with aracket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and thenstops, what impulse did he imply on the ball? What is the ball’s velocity?
#3. A 35 g bullet is fired in a ballistic pendulum deviceand increases the height of the center of mass of the device and the bullet by2.1 cm. If the level arm has a mass of 3.4 kg, what was the initial velocity ofthe bullet?
#4. A puck slides on a surface for 5.6 m before it stops.If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is theforce of friction exerted on the puck?
#5. If a tire on a semi-truck is 1.1 m in diameter. Howmany FULL rotations will the tire roll if the truck moves 24.5 meters?
#6. A large circus ride has a centripetal acceleration at6.0 m/s2. If the circular ride has a radius of 11.0 m, what is itsvelocity at the edge?
#7. If a 56 diameter circular disk is uniformly angularlyaccelerating at a rate of 5.0 rad/s2, what will the final angular velocity beafter 4.0 seconds if it starts at a rate of 10.0 rad/s? What angle is subtendedover that time?
#8. A 40.0 N force is applied to a 46.0 cm long torquewrench. What is the net torque applied to the nut? Also if this force isapplied for 3.0 seconds and the bolt starts from rest and ends with an angularvelocity of 0.5 rad/s, what is the bolt’s moment of inertia?
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