Sketch the free-body diagram for a mass that has a force of 10 N to the right, 7 N up, 3 N down, and 4 N to the left. What is the net external force on that mass? If the mass is 2 kg. find the acceleration.
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- The Lunar Reconnaissance Orbiter (LRO), with mass m = 1850 kg, maps the surface of the Moon from an orbital altitude of 50.0 km. What are the magnitude and direction of a. the force the LRO experiences due to the Moons gravity and b. the force exerted by the LRO on the Moon?2. Two masses were connected by a frictionless pulley and is placed in an inclined plane with kinetic friction coefficient of 0.2. If we let mass m2 to move at a constant speed downwards, give the following: a. Draw the FBD and write the summation of all forces acting on the masses. b. Solve for mass m2 if mass mı = 4kg. c. Find the tension force of the string.An old phrase used to sell cars was that they could "stop on a dime," meaning they could stop before the car moved a distance equal to the diameter of a dime. a. To see if this is realistic, calculate the net force needed to stop a 490-kg car moving at 25 miles/hour in a distance of 1.8 cm (the diameter of a dime). b. Compare that force to the weight of the car. Are they even close to the same size? Based on your comparison, is "stopping on a dime" a reasonable claim, or is the force needed unreasonably large? c. Calculate how much time it would take the car to stop. Is this a reasonable time for a car moving at 25 mph to stop, based on your experience traveling in cars?
- Calculate the acceleration of a 1400 kg car that stops from 37 km/h on a dime ( on a distance of 1.7 cm) 1. Determine the acceleration of the car? 2. How many g’s is the magnitude of the acceleration of the car? 3 . what is the force felt by a 68 kg occupant of the car?1. The International Space Station has a mass of approximately 370,000 kg. a. What is the force on a 130 kg suited astronaut if she is 22 m from the center of mass of the station? b. How accurate do you think your answer would be?Problem 2: Peter pushed a 84 kg box down a sloping metal surface with a push force of 50 N. The slope angle = 16°. The kinetic friction coefficient between the box and the sloping metal surface was p 0.34. Type your answers (number and unit) into the answer sheet on lines 34-38. 34. Calculate gravity force on the box. 35. Calculate normal force acting upon the box. 36. Calculate friction force acting upon the box. 37. Calculate applied force (unassisted) 38. Calculate the net force acting upon the box. -> 3 4 5 %24 TA TA TA TA AAAA
- A 65 kg student stands on a bathroom scale in an elevator. She notices that the scale reads 520 N. Assume downward is positive. Round all answers to the whole numbers. 1. The scale reads the actual (actual/apparent) weight of the student. 2. There are forces in the FBD. 3. The student's weight is 637 N. 4. The net force acting on the student is N. 5. The acceleration of the elevator is m/s?. 6. If the elevator has a speed of 1.7 m/s, it travels m after 3 s.A 4.0-kg box lies on a table. You pull it up with a force of 12 N and it doesn't move. Match the answers with question. Use g = 10 m/s2. (Hint: Be careful with the signs.) F. the weight force on the box by the Earth the pulling force on the box by the hand the normal force on the box by the table the net force on the book A. 12 N B. 28 N C. 52 N D. none of the given E. -52 N F. -40 N G.-12 N H. -28 N I. 40 N J. 0The gravity acceleration at a certain level is 9.78 m/s². This acceleration varies by 8.28 x 10-⁴ m/s² for every 100m ascent. a. Find the weight of an object above this level where the acceleration due to gravity is 9.70 m/s². b. Find the weight of an object relative to this point whose mass is 80 kg at a height of 10, 000 meters c. Find the height above this point if the weight of a man decreased by 5%.
- An astronaut weighing 236 lbs on Earth is on a mission to the Moon and Mars. a.What would he weigh in newtons when he is on the Moon? The acceleration due to gravity on the Moon is one-sixth that on Earth? b. How much would he weigh in newtons when he is on Mars, where the acceleration due to gravity is 0.38 times that on Earth? c. What is his mass in kilograms on Earth?6. Newtons Laws a. Write Newton's First law.. b. Write Newton's Second law. c. Write Newtons Third law. 7. A bowling ball and a feather are dropped from a height of 100 ft. The bowling ball weighs 12 Ibs and the feather weighs 3 ounces. a. What is the Force (in Newtons) of both objects? b. The value of g is varies depending on what planet you are on. Bigger planets have a larger value of g. The value of g on the moon is 1.62 m/s². Calculate the forces of these objects falling on the moon.QUESTION 4 Zach, whose mass is 70 kg, is in an elevator going up at a constant speed of 2.0 m/s. Match the answers with questions. Use g = 10.0 m/s². What is the net force on Zach? What is the weight force on Zach? (This is Zach's true weight.) A. 140 N B. 70 kg C. -70 kg ✓ What is the normal force on Zach? (This is Zach's apparent weight.) D. -140 N E. 700 N F. ON G. -700 N