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fuel goes down because.... a) the fuel pushes on the ground b) air friction pushes on the escaping fuel. c) The downward momentum of the exhaust equals the upward momentum of the rocket. This additional upward momentum is enough to compensate for the downward acceleration due to grav- ity. of the above

fuel goes down because.... a) the fuel pushes on the ground b) air friction pushes on the escaping fuel. c) The downward momentum of the exhaust equals the upward momentum of the rocket. This additional upward momentum is enough to compensate for the downward acceleration due to grav- ity. of the above

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11. 12. A rocket blasts off from a launch pad. The rocket goes up as the fuel goes down because... 13. a) the fuel pushes on the ground b) air friction pushes on the escaping fuel. c) The downward momentum of the exhaust equals the upward momentum of the rocket. This additional upward momentum is enough to compensate for the downward acceleration due to grav- ity. a) None of the above. A simple pendulum, 1.00 m in length, is released from rest when the support string is at an angle of 35° from the vertical. What is the speed of the suspended mass at the bottom of the swing? (Ignore air resistance, g = 9.80 m/s²) a) 0.67 m/s b) 0.94 m/s c) 1.33 m/s d) 1.88 m/s An airplane of mass 1.5x104 kg moves horizontally at a speed of 60.0 m/s. The pilot then increases the engine's thrust to 7.50 x104 N. The air resistance is 4.00x104 N. Find the speed of the airplane after it has traveled 5.00x10² m horizontally while main- 11.0 taining a constant altitude. a) 1.36x104 m/s b) 2.33x10³ m/s c) 77 m/s d) both a and b depending on the root.
Transcribed Image Text:11. 12. A rocket blasts off from a launch pad. The rocket goes up as the fuel goes down because... 13. a) the fuel pushes on the ground b) air friction pushes on the escaping fuel. c) The downward momentum of the exhaust equals the upward momentum of the rocket. This additional upward momentum is enough to compensate for the downward acceleration due to grav- ity. a) None of the above. A simple pendulum, 1.00 m in length, is released from rest when the support string is at an angle of 35° from the vertical. What is the speed of the suspended mass at the bottom of the swing? (Ignore air resistance, g = 9.80 m/s²) a) 0.67 m/s b) 0.94 m/s c) 1.33 m/s d) 1.88 m/s An airplane of mass 1.5x104 kg moves horizontally at a speed of 60.0 m/s. The pilot then increases the engine's thrust to 7.50 x104 N. The air resistance is 4.00x104 N. Find the speed of the airplane after it has traveled 5.00x10² m horizontally while main- 11.0 taining a constant altitude. a) 1.36x104 m/s b) 2.33x10³ m/s c) 77 m/s d) both a and b depending on the root.
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