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- Q1. A 2 kg bob moves along a circular path in the vertical plane. When the bob is at the highest point, the bob has a speed of 6 m/s. Determine the tension in the cord at this moment 2mQuestion 20, Physics - equation sheet attached4. When a particle falls through the air, its initial acceleration a = g diminishes until it is zero, and thereafter it falls at a constant velocity vf . If this variation of the acceleration can be expressed as g(v; -v²) a determine the time needed for the velocity to become v < Vf. Initially the particle falls from rest. (H 12-33) + v Answer: t = -In 2g V, - v
- 7. Sally is driving at a constant speed of 25 m/s on a straight horizontal road. She sees an obstacle on the road ahead and applies the brakes! The wheels lock causing the car to slide forward. If the coefficient of kinetic friction between the tires and the road is 0.40, how long does it take the car to come to a complete stop?- 46 and R4 = 24 For the following configuration, V,=44 V, R, =2 k2, R2=9, R3 = k2. Vo = ... V R2 R1 R3 R4 السؤال 11 من 18 >« يقوم الانتقال إلى سؤال آخر بحفظ هذا الرد3. One object dropped from the top of a tall building, and one second later a second object is dropped. Neglecting air resistance, the distance between the falling objects will a. Be constant b. Decrease c. Increase d. Depend on their weight e. Depend on the speed of the plane. Explain your reasoning:
- q20Add FBD if you can, thanks2. You place a crate of mass 37.0 kg on a frictionless 4.65-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.37 s after you released it. What is the angle of the incline? 42.4 degrees 55.1 degrees 36.4 degrees 30.3 degrees
- ii. Derive an expression for the maximum displacement possible for the block that will allow the block to still remain at rest. Express your answer in terms of MM, kk, μk, μs, and physical constants, as appropriate.Note the expression: y = x. Which statement is most consistent with this expression? O if x triples, then y doubles O ifx doubles, then y doubles O ifx doubles, then y quadruples O ify doubles, then x quadruples O y is greater than x35. A small block slides along the inside of a frictionless vertical circular track. At the high point of the motion the block's acceleration has magnitude 2g. What is the magnitude of the block's acceleration at the low point? a) 6g ☐ b) 5g c) 4g d) 3g e) 2g (numbers 36-37) An object's position versus time graph is shown.