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Category 1

Category 1. 10. 20. 30. 40. 50. Category 2. 10. 20. 30. 40. 50. Category 3. 10. 20. 30. 40. 50. Category 4. 10. 20. 30. 40. 50. Category 5. 10. 20. 30. 40. 50. Category 1 questions follow. Category 1. 10.

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Category 1

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  1. Category 1 10 20 30 40 50 Category 2 10 20 30 40 50 Category 3 10 20 30 40 50 Category 4 10 20 30 40 50 Category 5 10 20 30 40 50

  2. Category 1 questions follow

  3. Category 1 10 If 2 cars collide after rolling towards each other, both with the same mass and speed, what is their combined momentum after they meet?

  4. Category 1 10 If 2 cars collide after rolling towards each other, both with the same mass and speed, what is their combined momentum after they meet? Remember m1v1 = m2v2 The resultant momentum = 0

  5. Category 1 20 What fairly safety method can you use to produce a higher velocity when shooting a clown out of a cannon?

  6. Category 1 20 What fairly safety method can you use to produce a higher velocity when shooting a clown out of a cannon FT = mv Without increasing the force, and the clown having the same mass, the longer the barrel, the greater the velocity

  7. Category 1 30 You are in a 200 kg car going 50 km/hr. Which of the following will produce the least amount of force on impact? Hitting an immovable brick wall Hitting car head on which is 100 kg moving 200 km/hr

  8. Category 1 30 You are in a 200 kg car going 50 km/hr. Which of the following will produce the least amount of force on impact? MV= 10 000 Hitting an immovable brick wall (same as original) Hitting car head on which is 100 kg moving 200 km/hr MV = 20 000

  9. Category 1 40 Compare the force of a raindrop on the ground that hits the ground and bounces up to one which simple hits and lays on the ground. (which has the greatest force?

  10. Category 1 40 Compare the force of a raindrop on the ground that hits the ground and bounces up to one which simple hits and lays on the ground. (which has the greatest force? A drop of water that bounces up indicates that it has more momentum than one which simply fell.

  11. Category 1 50 If you are on a frictionless boat on a lake with no friction, what would move you to the right edge the fastest? Blow in and out in one direction Throwing a 2 kg boot to the right Throw a 1 kg baseball to the left

  12. Category 1 50 If you are on a frictionless boat on a lake with no friction, what would move you to the right edge the fastest? Blow in and out in one direction Throwing a 2 kg boot to the right Throw a 1 kg baseball to the left- (for every action there is an opposite and equal reaction)

  13. Category 2 questions follow

  14. Category 2 10 An astronaut is floating in space and needs to get back to the ship. He throws a wrench is the direction opposite of where he wants to go. He will move___ a. Away from the ship at the same velocity as the wrench is moving b. Toward the ship at the same velocity as the wrench is moving c. Toward the ship at a slower velocity than the wrench is moving d. Toward the ship at a faster velocity than the wrench is moving

  15. Category 2 10 An astronaut is floating in space and needs to get back to the ship. He throws a wrench is the direction opposite of where he wants to go. He will move___ a. Away from the ship at the same velocity as the wrench is moving b. Toward the ship at the same velocity as the wrench is moving c. Toward the ship at a slower velocity than the wrench is moving ** opposite and equal (mv = mv) d. Toward the ship at a faster velocity than the wrench is moving

  16. A bike is traveling with a constant speed down hill at the same rate as a bus which has 10 times its mass. They have the same momentum They have the same force of impact if the hit a wall at the bottom They both have zero acceleration 20

  17. Category 2 20 A bike is traveling with a constant speed down hill at the same rate as a bus which has 10 times its mass. They have the same momentum They have the same force of impact if the hit a wall at the bottom They both have zero acceleration

  18. Category 2 30 Describe how these factors affect the amount of force that a ball hits the ground with Its speed on impact The length of impact with the ground (did it hit concrete or dirt) If it bounced

  19. Category 2 30 Describe how these factors affect the amount of force that a ball hits the ground with Its speed on impact- higher speed = more force The length of impact with the ground (did it hit concrete or dirt)- the longer the impact, the less the force If it bounced- bouncing indicates more force than laying still

  20. Category 2 40 What do the following have in common? a. Children wear helmets when riding bikes b. Play ground equipment have rubber mats underneath c. Jumping with your knees bent

  21. Category 2 40 What do the following have in common? a. Children wear helmets when riding bikes b. Play ground equipment have rubber mats underneath c. Jumping with your knees bent They all decrease force by increasing the time of impact

  22. Category 2 50 What is the reaction force to the following action forces? Tires on the road Rocket exhaust Walking on the floor The pull of the earth on you- The boxer hits a bag

  23. Category 2 50 What is the reaction force to the following action forces? EQUAL AND OPPOSITE FORCES Tires on the road- road pushing up against tire Rocket exhaust- rocket moves forward Walking on the floor- floor pushes up on feet The pull of the earth on you- the pull of you on the earth The boxer hits a bag- the bag hits the glove

  24. Category 3 questions follow

  25. Category 3 10 A car with a momentum of 40 kg m/s and a mass of20 meters will have a speed of __________

  26. Category 3 10 A car with a momentum of 40 kg m/s and a mass of20 meters will have a speed of __________ P = mv or momentum = mass (velocity) So 40 kgm/s = 20 kg (v) 10 m/s = V

  27. Category 3 20 Zero acceleration occurs when an object is At constant velocity In mechanical equilibrium At rest At terminal velocity All of these

  28. Category 3 20 Zero acceleration occurs when an object is At constant velocity In mechanical equilibrium At rest At terminal velocity All of these Acceleration occurs only when there is a change in speed or direction

  29. Category 3 30 Your Weight a. Is dependent on ___________ Is a unit of _______________ called Newtons

  30. Category 3 30 Your Weight a. Is dependent on _the grativational attraction on you Is a unit of _force___ called Newtons

  31. Category 3 40 The force on a sky diver is dependent on Size of person Speed of object Both of these

  32. Category 3 40 The force on a sky diver is dependent on Size of person Speed of object Both of these

  33. Category 3 50 An object that has a mass of 50 kg has a weight of About 500 N About 5 N About 50 kg

  34. Category 3 50 An object that has a mass of 50 kg has a weight of About 500 N About 5 N About 50 kg W = mg so Wt = 50 kg (10 m/s2) = 500 N

  35. Category 4 questions follow

  36. Category 4 10 A force of 50 N is needed to move a box at 10 m/s. What is its mass?

  37. Category 4 10 A force of 50 N is needed to move a box at 10 m/s. What is its mass? F = ma 50 N = 50 kg m/s2 50 kg m/s2 = m (10m/s2) 5 kg

  38. Category 4 20 The bug which hits the windshield always exerts Less force than the windshield More force than the windshield The same force than the windshield

  39. Category 4 20 The bug which hits the windshield always exerts Less force than the windshield More force than the windshield The same force than the windshield

  40. Category 4 30 A train with 2 cars runs head on into a train with only 1 car, with all the cars having the same mass Which has a greater change in momentum?

  41. Category 4 30 A train with 2 cars runs head on into a train with only 1 car, with all the cars having the same mass Which has a greater change in momentum? The train with only 1 car changes momentum faster

  42. Category 4 40 A train with 2 cars runs head on into a train with only 1 car, with all the cars having the same mass Which hit with the most force?

  43. Category 4 40 A train with 2 cars runs head on into a train with only 1 car, with all the cars having the same mass Which hit with the most force? Remember- For every reaction there is an opposite but equal reaction- they hit with the same force

  44. Category 4 50 Why would a small gun firing a large bullet be a hazard?

  45. Category 4 50 Why would a small gun firing a large bullet be a hazard? Because there may be more force going backward than forward M1v1 = m2v2

  46. Category 5 questions follow

  47. Category 5 10 Compare a 1 kg mass moving 10 m/s to a 2 kg mass traveling at the same speed.

  48. Category 5 10 Compare a 1 kg mass moving 10 m/s to a 2 kg mass traveling at the same speed. If you double the mass, the momentum is doubled (directly proportional)

  49. Category 5 20 Weight Is A gravitational attraction Is Measured in kilograms Never changes

  50. Category 5 20 Weight Is A gravitational attraction Is Measured in kilograms Never changes

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