Problem 3: A ball is hanging at rest from a string attached to the ceiling, as seen in the first image in the image carousel, and the tension in the string is T. The ball is pushed so that it starts moving in a horizontal circle, as seen in the second image in the image carousel, and the tension in the string is Tnew.
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- A person is holding a beam at rest as shown with theta= 36.3 degrees and phi= 62.7 degrees. The beam has a mass of 21.7 kg. What is the magnitude of the friction force from the ground on the beam? and What is the tension in the rope attached to the beam?A pail of water is rotated in a vertical circle of radius 1.00 m. (a) What two external forces act on the water in the pail? (b) Which of the two forces is most important in causing the water to move in a circle? (c) What is the pails minimum speed at the top of the circle if no water is to spill out? (d) If the pail with the speed found in part (c) were to suddenly disappear at the top of the circle, describe the subsequent motion of the water. Would it differ from the motion of a projectile?10. Referring to the image to the right, the mass of Block 1 is m1=3.37kg while the mass of Block 2 is m2=8.38kg. The coefficient of kinetic friction between Block 1 and the inclined surface is μk=0.41. The inclined surface is at an angle θ=34.2∘above the horizontal. (a) Using the variables from the problem statement together with the acceleration due to gravity, gg, write an equation for the magnitude of the acceleration of the system. Hint: Based upon the numeric choices, Block 1 will accelerate up the incline while the suspended block, Block 2, accelerates vertically downward. (b) Calculate the magnitude, in meters per squared second, of the system's acceleration.
- 39. A ball of mass 5.0 kg is attached to the end of a 2.2 m long string and whirled around in a circle thatdescribes a vertical plane. (a) What is the minimum speed that the ball can be moving at and still maintain a circular path? Provide afree-body diagram.(b) At this speed, what is the maximum tension in the string? Provide another free-body diagram.(c) If the ball is rotated in a horizontal circle at the same speed with the end of the string held above the head,what angle does the string make with the horizontal?A ball is launched from the base of a plane with inclination ϴ = 45º Determine (a) acceleration on ascent and on frictionless descent. (b) acceleration in ascent and descent with friction (c) If the ball is thrown with a velocity V0 = 20 m/s determine the rise times with and without friction. likely answers to letter a and b I just wanted the answer to the letter C likely answers to letter a and b (image)With an initial speed of v0 in the horizontal direction, a little bead of mass m glides down from the top of a hemisphere. The bead does not leave the surface at the top because the speed v0 is small enough. The hemisphere's radius is R, and the surface between the bead and the hemisphere is assumed to be frictionless. Throughout the process, the hemisphere is maintained in place.(1) (a) Assume that the bead is still in touch with the hemisphere when it is angled away from the vertical, as illustrated in the right picture. At that point, what is the speed of the bead? Describe your solution in terms of v0, R, and g.(b) If you want to be more formal When the bead reaches a height of h, it will leave the surface. In terms of v0, R, and g, write it down.
- A 50.0 kg woman stands on a bathroom scale while riding in an elevator. While the elevator is moving her weight shown on the scale is 580 N. What is the direction and magnitude of the acceleration of the elevator?A city is trying to determine the speed limit for a given stretch of road. If a stop sign is visible from 62.0m on a straight, horizontal stretch of road and the coefficient of static friction between the road and the tires of a car is 0.525 then what is the maximum speed for a car in meters per second so that it can come to a complete stop at the stop sign?If Jeno's wooden ball has mass 0.25 kg and tied to a rope executes uniform circular motion with a speed of 2 m/s of radius 3.5 m, what is the magnitude of force acting on his wooden ball?