1)

A railroad car with a mass of 8000 kg moving at 3.6 mls collides with a second, stationary car with a mass of 6500 kg.The two cars stick together after the collision. Find the velocity of the combination after the collision. Ryan, m = 45 kg, runs and jumps off a stationary, 1 68-kg floating platform on a lake. Ryan's velocity as he leaps is +2.7 m/s. Ignoring any frictional effects, what is the recoil velocity of the platform? a. -2.7 m/s b. +0.72 m/s c. -1.4 m/s d. -0.72 m/s e. +2.7 m/sA comet fragment of mass L96 X l0l3 kg is moving at 6.50 X l04 m/s when it crashes into Callisto, a moon ofJupiter. The mass of Callisto is |.08 X l023 kg. The collision is completely inelastic. a.Assuming for this calculation that Callisto's initial momentum is zero kg X mls, what is the recoil speed of Callisto immediately after the collision? b. How much kinetic energy was released in the collision? A 0.50-kg bomb is sliding along an icy pond (frictionless surface) with a velocity of 2.0 m/s to the west. The bomb explodes into two pieces. After the explosion, a 0.20-kg piece moves south at 4.0 mls. What are the components of the velocity of the 0.30-kg piece? (a) The ballistic pendulum consists of a block of wood(mass m2=2.5kg)suspended by a wire of negligible mass.A bullet(mass m|=0.0| kg)is red with a speed v0l.After collision, the block has a speed vf m] and then swings to a maximum height of 0.65m above 7 the initial position. Find the speed VOI of the bullet, "'1 assuming air resistance is negligible. [m Ill V H12 n,=o.650 m H!1+ \"J2 :::' 7777777777777 \fJust before collision JUSt after co'liSion Is the Kinetic energy of the system conserved? m; "=1 Is conservation of momentum valid? m1+m2