Chapter 10 SG Review Advanced

1. What causes an object to start or stop moving? 2. Define force A PUSH OR A PULL 3. How is force similar to velocity and acceleration? A FORCE STARTS AN OBJECT MOVING. VELOCITY CALCULATES ITS SPEED AND DIRECTION. ACCELERATION CALCULATES THE VELOCITY/TIME. 4. What are vectors? ARROWS THAT REPRESENT FORCE, DIRECTION AND MAGNITUDE!

6. Which direction does the net force always act? 5. What are net forces? ALL OF THE FORCES ON AN OBJECT ADDED TOGETHER. 6. Which direction does the net force always act? IN THE DIRECTION THAT THE OBJECT MOVES 7. What are unbalanced forces? FORCES THAT ARE NOT EQUAL 8. What do unbalanced forces cause? MOVEMENT OF THE OBJECT. 9. What are balanced forces? FORCES THAT ARE EQUAL

10. How do balanced forces affect movement? THE OBJECT WILL NOT MOVE. 11. List 5 things Newton contributed to science and math. 1) Calculus 2) Laws of Motion 3)Theory of Gravity 4) Reflecting Telescope 5) Light is composited of rainbow colors 12. State Newton’s 1st Law AN OBJECT AT REST WILL REMAIN AT REST. AN OBJECT IN MOTION WILL REMAIN IN MOTION UNLESS ACTED UPON BY AN UNBALANCED FORCE.

14. What is mass measured in? 15. Define inertia. 13. What are the 2 forces that keep objects from moving forever on earth? FRICTION AND GRAVITY 14. What is mass measured in? KILOGRAMS 15. Define inertia. AN OBJECTS TENDENCY TO RESIST MOTION 16. List 4 types of friction 1) SLIDING 2)ROLLING 3) STATIC 4) FLUID 17. What is the reason for wearing a seatbelt? WHEN THE CAR IS TRAVELING 80MPH SO ARE YOU! YOU HAVE INERTIA AND WILL FLY THROUGH THE WINDSHIED IF THE CAR IS WRECKED!

19. What is the unit for force? 18. What is Newton’s 2nd law? ACCELERATION DEPENDS ON AN OBJECTS MASS AND THE NET FORCE ACTING ON THE OBJECT. 19. What is the unit for force? NEWTONS 20. What is acceleration due to gravity on earth? 9.8 M/S^2 21. What is acceleration due to gravity on the moon? 1.6M/S^2 22. What is acceleration due to gravity on mars? 4.0 M/S^2

23. If you weigh 980N on earth what is your mass? 100 kg 24. What is your weight on the moon? 100 X 1.6M/S ^2 25. What is your weight on mars? 100 X 4.0M/S^2 26. If your mass is 100kg on earth what is your mass on the moon? 100 kg. 27. How do you calculate weight? MASS x ACCELERATION

28. What is terminal velocity? THE GREATEST VELOCITY A FALLING OBJECT REACHES. 29. State Newton’s 3rd Law. For every action there is an equal and opposite reaction. 30. Define momentum. MASS X VELOCITY 31. What two factors determine momentum? MASS OF THE OBJECT AND HOW FAST IT IS TRAVELING. 32. what is the equation for momentum?

33. If I double the mass what happens to momentum? 34. What is thrust? THE MOMENTUM WOULD DOUBLE AS WELL! 34. What is thrust? AN UPWARD FORCE 35. What is a satellite? ANY OBJECT THAT ORBITS ANOTHER OBJECT IN SPACE. 36. What is centripetal force? CENTER SEEKING 37. What is projectile motion? ANY OBJECT THAT IS THROWN INSTEAD OF DROPPED

38. What is the speed needed to orbit the earth? 7900 m/s 39. How much force is required to accelerate a 50kg mass at 4m/s^2 F= MA F= 50 X 4 = FORCE = 200N 40. What is the acceleration of a 7kg mass being pulled by a 56 N force? A= F/M A=56N /7kg A= 8 m/s^2

42. What is the momentum of a 50kg mass moving at 12m/s? 41. Given a force of 75N and an acceleration of 3m/s^2, what is the mass? M= F/A M= 75N/3 m/s^2 M= 25kg 42. What is the momentum of a 50kg mass moving at 12m/s? P= M x V P = 50 X 12 P = 600 km/m/s 43. What is the mass of an object that has a momentum of 100kg/m/s traveling at 20 m/s? M = P/V M = (100 kg/m/s) / 20m/s M= 5kg

44. What is the velocity of an object that has a momentum of 50kg/m/s and a mass of 5kg. V = P/M V = (50 kg/m/s) / 5 kg V = 10 M/S 45. In a collision, a 50kg mass (M1) moving a 6m/s (V1) transfers all of its momentum to a 10 kg mass (M2). What is the velocity (V2) of the 10 kg mass after the collision? P= M1 x V1 P= 50kg x 6m/s P= 300kg/m/s V2 = P/M2 V2 = (300 kg/m/s ) / 10 kg V2 = 30M/S

46. A 16 kg mass (M1) moving at 16m/s (V1) collides with a stationary 10 kg mass (M2). After the collision, both the 16 and 10 kg mass move off in the same direction. If the 16kg mass is moving at 6m/s, what is the speed of the 10 kg mass? P= M x V P= 16 x 16 = 256 KG/M/S (Momentum BEFORE) P= 16 x 6 = 96 KG/M/S (Momentum AFTER) 256-96 = 160 KG/M/S (net momentum) V2 = P/M2 V2 = 160/10kg V2= 16m/s

47. A 16 kg mass moving at 16m/s collides with a 12 kg mass moving in the same direction at 12m/s. After the collision, both the 16 and the 12 kg mass continue to move in the same direction. If the 16 kg mass is moving at 10 m/s, what is the speed of the 12 kg mass? P= M x V P= 16 x 16 = 256 KG/M/S- MOMENTUM BEFORE P= 12 x 12 = 144 KG/M/S – MOMENTUM BEFORE 256 + 144 = 400 KG/M/S- MOMENTUM OF BOTH P = 16 x 10= 160 KG/M/S- MOMETUM AFTER 400- 160 = 240 KG/M/S- MOMETUM AFTER 240= 12 x V = 20m/s

48. On the earth’s surface how much does a 100 kg mass weigh? Weight = Force F=M x A F = 100kg X 9.8m/s/s = 980 N 49. What force is necessary for a person to hold a 50 kg mass over their head? F = MA Fgravity = Flift (Forces must be BALANCED!) Fgravity= (50kg) x (9.8m/s/s) = 490 N Flift – 490N 50. How much force is required to accelerate a 10 kg mass upward with a rate of 5 m/s^2 F= MA F= 10 x 5 = 50N

52. How much force is required to accelerate a 22kg mass at 6m/s^2? 51. A 50 kg rocket generates 990N of thrust. What will be its acceleration if it is launched straight up? A = F/M A = Fthrust- Fgravity/M Fgravity = M x Agravity = (50kg)(9.8 m/s/s) = 490N A= 990N -490N/50kg A= 10m/s/s 52. How much force is required to accelerate a 22kg mass at 6m/s^2? F= MA F= 22 X 6 = 132N

54. What is the acceleration of the 10kg block? F gravity = Ftension 53. What is the acceleration of a 70 kg mass being pulled by a 140N force? A = F/M A = 140N/70kg A= 2m/s/s 54. What is the acceleration of the 10kg block? F gravity = Ftension Fgravity = M x A gravity Fgravity = (2kg)(9.8m/s/s) = 19.6N A = Ftension/M1 + M2 A= 19.6N / 10kg + 2kg A = 1.6 m/s/s

55. What is the net force on the 8 kg block? 3N to the left 56. Calculate the acceleration of the 8kg block. A = F/M A = 3N / 8kg A = 0.375 m/s/s