Question

Could I get some help on these 3 questions please, thank you!

5A railroad freight car, mass 15000 kg. is allowed to coast along a level track at a speed of S m's It collides and couples wit 3 50,000 kg loaded second car, initially at rest and with brakes released What percentage of the initial kinetic energy in the 15000 kg car is preserved in the two coupled cars after collision? A)30% B) 12% C)60% D) 563% E)23.1% respectively If the ball is in contact with the plate f during imput? 0 025 seconds, what average force does the ball esent on the plate ) 3375N B) 9ON 25N D) 3333NE174N 归 A) 64 rads B) 224 ads 2.96rads D 01143 ad's E 128

Answer 1

l6 V. o C V, 7 m/s orie exentes mx Acceleration 8·ト 174 N