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i need help with these set of problems. please answer these i will rate thumbs up.
A Fedex truck is traveling (on level ground) around a circular rotary which has a radius of 100 m. At a certain instant of time. the truck is traveling at a speed of 6.00 m/s and slowing down at a rate of 0800 m 20. Which of the following figures shows the approximate direction of the truck's overall acceleration? The figures show the rotary as seen from above. A) B) D) E) 21. The truck's overall acceleration has a magnitude of A.0.360 m 8.0.877 m2 C 0.770 m 1.00 omy 0800 m 22. General TRUE or FALSE question: At a certain instant of time, an object is observed to be at rest At that instant, the resultant force acting on the object is surely zero? A TRUE B. FALSE 23. General TRUE or FALSE question: A big refrigerator is at rest on your kitchen floor. You exert a horizontal force on the refrigerator in an effort to move it You will not be able to move the refrigerator of the refrigerator pushes back on you as strongly as you push on it? A TRUE B. FALSE In the Prudential Tower, a physics student stands on a bathroom scale while taking the elevator downwards. At a certain instant of time, the elevator and the student are moving downwards at a speed of 2.00 m/s, and speeding up at a rate of 1.00 At that instant of time, the scale reading is 660 N. 24. The mass of the student is equal to A 67.3 kg B. 61.16 C 75.0 kg D. 55.94 E. 84.52 25. The resultant force acting on the student is equal to A. 55.9 Nup 8. 61.1 N down C. 84.6 Nup. D. 67.3 N down E 750N down
A 650 N student attaches a system of pulleys and cords to a 2400 N crate, as shown in the Figure below. The student then exerts a constant 200 N force straight downwards on the rope at the left, as shown in the Figure. Assume that the pulleys and cords have negligible weight and that the pulleys are ideal and frictionless T: E A 29. The tension T. equals A 600 N B. 1200N C1800 N D. 2400 N E 3600 N 30. The crate's acceleration is A. 34.3. UP 8. 245 "DOWN C 490 / UP D. 735 / DOWN E ZERO OPTIONAL EXTRA CREDIT QUESTIONS: You may skip these 5 questions entirely answer them in addition to questions in the main body of the exam, or answer them in place of questions in the main body of the eam. I will simply add up the number of correct answers which you submit, divide by 30, and multiply by 100% to obtain your exam score. It is possible to cam 116.67% on this exam! 31. True or False: An object cannot be at rest at a certain instant and yet accelerating? A TRUE B. FALSE 32. True or False: The unit vector i has scalar y-component equal to zero? A TRUE B. FALSE 10