(2) Determine the couple by the pair of 150 N forces acting on the handles of the pipe wrenches by the geometric method. Ans: M=-751+22.5 N·m 250 mm 150 mm 150 N 250 mm 150 N -x
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- Solve for the value of v: 6 = (1/12)vA cowboy spins a lasso in an approximately circular shape, with a starting circumference of 10 feet. The force on the rope pulls it through the slip-knot so that the circle's circumference decreases by 1 foot per second. 2 Part A: Determine a formula that describes the lasso's circumference, in feet, t seconds after the cowboy starts spinning it. C= Part B: After how long will the lasso's circle vanish? seconds Answer: Part C: The circumference of a circle is also C = 2mr. Use this formula to give the radius of the circle as a function of time. T Part D: Using the circumference formula developed in Part A, determine the rate of change of the AC circumference of the lasso, At Answer: ft/s Part E: Using the radius formula developed in Part C, give the rate of change for radius, Answer: ft/s Ar Aty=-4sin(pi/2 x) +2 state the eqaution for the midline
- A bodybuilder lifts a 370 N set of weights from ground level to a position over his head, a vertical distance of 2.40 m. How much work (in J) does the bodybuilder do? Assume the weights are moved at constant speed. JA rescue plane flies horizontally at a constant speed searching for a disabled boat. When the plane is directly above the boat, the boat's crew blows a loud horn. By the time the plane's sound detector perceives the horn's sound, the plane has traveled a distance equal to one-third its altitude above the ocean. (a) If it takes the sound 2.18 s to reach the plane, determine the speed of the plane. Take the speed of sound to be 343 m/s. m/s (b) What is its altitude? mA car is initially traveling at 50.0 km/h. The brakes are applied and the car stops over a distance of 35 m. What was magnitude of the car's acceleration while it was braking? (A 2.8 m/s? B 71 m/s? 5.4 m/s? (D) 36 m/s?
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