Name: _______________________ Date: _____________________ Forces Worksheet #2 Formulas: Fg = mg or F= ma g = 9.8 N/kg If you are unsure how to proceed, refer to your notes. If you feel that you require more information, use chapter 3 of your textbook. 1. In each of the following situations, does the force involve pulling or pushing? a) the force of a dog on its leash b) the force of a person inserting a letter in an envelope c) the force of a magnet on a paper clip d) the force of a bowstring on an arrow 2. The illustration opposite represents the action of a force. a) Is the force applied horizontally or vertically? b) Which symbol indicates the direction of the force? c) What is the magnitude of the force? 3. Using force arrows complete the diagram below with the following elements.  An applied force of 30N at an angle of 40°.  The effective force acting on the sled. 4. If you were 10 000 Km from the Earth’s center, how would your mass vary? Explain your answer. 5. Katerina has a mass of 43kg. a) What is her weight at the Earth’s surface? b) What is her weight on the moon? (g = 1.6 N/kg) 6. Plasma or liquid crystal television sets are much lighter in weight than the old models with cathode ray screens. What is the weight of a television set that has a mass of 25 kg at the Earth’s surface? 7. On the surface of which planet of the solar system would you be heaviest? Explain your answer. 8. Which of the following situations will have the same effect as a force of 50 N? Explain your answer. a) two forces of 25 N applied along the same line of action but in opposite directions b) two forces of 25 N applied along the same line of action and in the same direction c) two forces of 25 N applied along different lines of action but in the same direction 9. The motor of a boat has a propulsion force of 75 N, while the frictional force of the water against the hull is 10 N. What is the resultant force of this system? Friction 10. A bottle rocket is subjected to a force of 62 N from air in a bicycle pump. Knowing that the mass of this rocket is 5 Kg, will this rocket rise up into the air? If so, what will the resultant force be?