CHAPTER 3.3 Outline
  • Write all answers in your bound journal
  • Make it NEAT and in COMPLETE SENTENCES, clearly identify which section you are working (using numbers)
  • Box final answers if doing math.
  • -4pt if you do not title and date the entry
  • -1pt (per infraction) if you do not clearly identify the sections, or number the problems

 

 
NON MATH (7pts)
 
  1. What is a collision? and what happens during the collision?
  2. What is an elastic collision? give an example.
  3. What is an inelastic collision? give and example.
  4. Is there such a thing as a perfect elastic collision? and where do they occur?
  5. What are the four steps to understanding collisions?
  6. Do elastic or inelastic collisions have greater momentum change, explain with 1kg rubber ball and a 1kg clay ball being dropped?
  7. What are three things engineers take into consideration when trying to prevent injury during car accidents?

33pts MATH: needs all 4 parts (1pt each)  054 Video Guide

  1. Free Body Diagram
  2. Equations written out
  3. Numbers
  4. Solve and Box your answer
  1. An 8,000-kg train car moves to the right at 10 m/sec. It collides with a 2,000-kg parked train car. The cars get stuck together and roll along the track. How fast do they move after the collision?
  2. how much force does it take to stop a 1,000-kilogram car in 10 seconds if the car is moving at 30 m/sec (67 mph)?
  3. While playing basketball in PE class, Logan lost his balance after making a lay-up and colliding with the padded wall behind the basket. His 74-kg body decelerated from 7.6 m/s to 0 m/s in 0.16 seconds.
    a. Determine the force acting upon Logan's body.
    b. If Logan had hit the concrete wall moving at the same speed, his momentum would have been reduced to zero in 0.0080 seconds. Determine what the force on his body would have been for such an abrupt collision.
  4. An 82-kg male and a 48-kg female pair figure skating team are gliding across the ice at 7.4 m/s, preparing for a throw jump maneuver. The male skater tosses the female skater forward with a speed of 8.6 m/s. Determine the speed of the male skater immediately after the throw.
  5. A candy-filled piñata is hung from a tree for Matthew's birthday. During an unsuccessful attempt to break the 4.4-kg piñata, Hayden cracks it with a 0.54-kg stick moving at 4.8 m/s. The stick stops and the piñata undergoes a gentle swinging motion. Determine the swing speed of the piñata immediately after being cracked by the stick.
  6. During an in-class demonstration of momentum change and impulse, Mr. H asks Jerome (102 kg) and Michael (98 kg) to sit on a large 14-kg skate cart. Mr. H asks Suzie (44 kg) to sit on a second 14-kg skate cart. The two carts are placed on low friction boards in the hallway. Jerome pushes off of Suzie's cart. Measurements are made to determine that Suzie's cart acquired a post-impulse speed of 9.6 m/s. Determine the expected recoil speed of Jerome and Michael's cart.
  7. A 70.9-kg boy and a 43.2-kg girl, both wearing skates face each other at rest on a skating rink. The boy pushes the girl, sending her eastward with a speed of 4.64 m/s. Neglecting friction, determine the subsequent velocity of the boy.
  8. Anna Litical and Noah Formula are doing The Cart and the Brick Lab. They drop a brick on a 2.6 kg cart moving at 28.2 cm/s. After the collision, the dropped brick and cart are moving together with a velocity of 15.7 cm/s. Determine the mass of the dropped brick. 
  
  
  
  
  
  

 
 
 
 
 
 
 
 
 
       
10) (a) 3.5 x 10^3 N  (b) 7.0 x 10^4 N

11) 6.7 m/s

12) 0.59 m/s
13) 2.6 m/s
14) 2.83 m/s, West
15) 2.1 kg