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This is Physics 20 (grade 11)- Module 3- Lesson 5 - Solving Net Force Problems

Question 6 A cardboard box with a mass of 30.0 kg is dragged across a level floor. An applied force of 111.0 N Not yet answered [East] and a friction force of 43.0 N [West] act on the box. Marked out of Calculate the acceleration of the box. Answer in units of m/s2, rounded to 1 decimal place. 1.00 Flag question Answer: Question 7 A milk carton (mass = 2.8 kg) is pushed across a smooth table by a horizontal force of 5.1 N. Not yet answered The coefficient between the carton and the table is 0.105. Marked out of 2.00 Calculate the acceleration of the milk carton. Answer in units of m/s2, rounded to 1 decimal place. Flag question Answer:Question 8 A box of cereal is pushed with an applied force of 2.4 N [W] across a table. If the cereal box has Answer saved a mass of 2.5 kg and the box accelerates at 0.41 m/s2 [W], what is the force of friction? Marked out of 2.00 What is the coefficient of friction for the table top? Flag Show all work done to find your answer. Upload work done on separate paper. question Paragraph BQuestion 9 A 5.0-kg toolbox is pulled west across a concrete floor with a rope. The rope makes an angle of Answer saved 45.0 with the floor. A force of 85.0 N is exerted on the rope. The coefficient of static friction is Marked out of 0.20 and the coefficient of kinetic friction is 0.12. 3.00 Calculate the acceleration of the box. Include direction and magnitude. Flag question Show all work done to find the answer. Upload work done on separate paper. Paragraph BQuestion 10 In the lab activity using Fletcher's Trolley, you explored two masses connected by a Not yet answered rope. One mass (called m2) sat on a table-top. The other mass (called m1) hung in Marked out of the air. 2.00 Flag question M2 Hanging Mass (M1) Suppose you were to place a 5.4 kg mass (called m2) on the table. What mass would you need to hang over the table (m1) to cause the system to accelerate at 2.4 m/s2? Ignore friction in your calculation. Express your answer rounded to the nearest 0.1 kg. Answer:Question 11 Consider again Fletcher's Trolley. Not yet answered Marked out of M2 2.00 Flag question Hanging Mass (M1) Suppose the hanging mass (m1) is 0.78 kg and the mass on the table (m2) is 0.51 kg. Calculate the acceleration of the system, rounded to 2 decimal places. Answer in units of m/s2. Answer:Question 12 For each of these calculations, treat downwards as negative and upwards as positive Not yet for the purposes of determining the sign of forces. answered Marked out of a) Calculate the apparent weight of an 80.0-kg person riding in an elevator that is accelerating 5.00 upward at a rate of 5.00 m/s2. Flag question The apparent weight would be N b) What is the apparent weight of an 80.0 kg person who is in "free fall"? N c) You are in an elevator accelerating upwards at 6.00 m/s2. If your apparent weight is 800 N, what is your mass? kg d) A passenger on an elevator has an apparent weight of 500 N while the elevator accelerates DOWNWARDS. If the passenger's mass is 70.0 kg, at what rate is the elevator accelerating? m/s2 e) While traveling down between floors at a constant speed, a passenger has a weight of 800 N. During the acceleration to stop the elevator, the passenger experiences an apparent weight of 1000 N. Calculate the acceleration of the elevator. m/s2