1235 PM Sat May 7 N K 10. 11. 12. 13. 14. 15. 16. . A block has two forces acting on it simultaneously. F1 is pushing the block to the east. F2 is pushing the block to the west. lf F1 is larger than F2, then the block is . When a man stands on a bathroom scale in a stationary elevator, the scale registers a force of 825 N. When the elevator is accelerating downward, the scale will register a force that is . A child pulls a 14.2 kg wagon across a level floor, causing it to accelerate at 7 m/ s2. If the force of friction between the wheels and the wagon is 9.7 N, what is the force applied by the child? Report your answer to one decimal place. Do not include the units in your answer or the computer will mark the problem wrong. Imagine you build a model rocket with a mass of .75 kg. When launched, the engine produces a net force of 9.3 N. What is the rocket's acceleration? A scooter and rider are moving along a bumpy road with a coefficient of friction of .81. The mass of the scooter is 35 kg and the rider's mass is 15 kg. What is the force of friction of the scooter and rider? What net force is needed to accelerate the scooter and rider at 5 m/s2 ? If the rider falls off and the same force is applied, what is the new acceleration of the scooter alone? A block of wood is 10 m long, 39 cm wide, and 100 mm high. Can you find the block's mass when the density is 377 kg/m3? Please report your answer to 1 decimal place. Do not include the units in your answer or the computer will mark the problem wrong. If the density of the object is greater than the density of the fluid, the force of gravity will be stronger than the buoyant force and the object will ? 73% E} @IQDEDCJ/ 1235 PM Sat May 7 N K 15. 16. 17. 18. 19. 20. 21. A block of wood is 10 m long, 39 cm wide, and 100 mm high. Can you find the block's mass when the density is 377 kg/m3? Please report your answer to 1 decimal place. Do not include the units in your answer or the computer will mark the problem wrong. If the density of the object is greater than the density of the fluid, the force of gravity will be stronger than the buoyant force and the object will A 500 kg weather balloon is designed to lift a 1600 kg package. Remember, Weight: mass * 9.8 and Density = [mass]/[volume of water displaced] What is the total mass of the balloon and the package? What is the weight of the balloon and package together? If the balloon is neutrally buoyant what is the buoyant force on the balloon/ package? What is the volume of a helium balloon if the density of helium is 1.2 Kg/L? '.~ 73% E} @IQDEDCJ/ 1235 PM Sat May 7 N K 2. A 10 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 73 N and points in the positive direction. Force B has a magnitude of 16 N and points in the negative direction. What is the net force acting on the block? Do not type in the unit or the computer will mark your answer incorrect. Report your answer to 1 decimal place. 3. A 9 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 15 N and points in the positive direction. Force B has a magnitude of 2 N and points in the negative direction. What is the acceleration of the block? Report your answer to 1 decimal place. Do not type in the unit or the computer will mark your answer incorrect. 4. Imagine you jump out of an airplane and wait 3.8 seconds before pulling the parachute. a. How fast are you going when you pull the chute? b. How far have you fallen before you pull the chute? To earn credit, you must show all of your work. 5. A ball thrown vertically upward reaches a height of 8.64 meters above the release point of the throw. At the release point, the speed of the ball is approximately m/s. Please show your work in order to earn credit for this question. 6. Two objects are released from a height near the surface of the Earth. Object A has a mass of m and Object B has a mass of 3m. After 4 seconds of free fall, Object A has reached a speed of v and has traveled a distance d. After 4 seconds of free fall, the speed and distance of Object B are 7. A block has two forces acting on it simultaneously. F1 is pushing the block to the '.~ 73% E} @IQDEDCJ/