A 45 kg , 5.5-m-long beam is supported, but not attached to, the two posts in the figure (Figure 1). A 23 kg boy starts walking along the beam. Part A You may want to review (Page 294). How close can he get to the right end of the beam without it falling over? For help with math skills, you may want to review. Express your answer to two significant figures and include the appropriate units. The Vector Crss Product HA d = Value Units Submit Request Answer Provide Feedback Figure < 1 of 1> 3.0 m

A 45 kg , 5.5-m-long beam is supported, but not attached to, the two posts in the figure (Figure 1). A 23 kg boy starts walking along the beam. Part A You may want to review (Page 294). How close can he get to the right end of the beam without it falling over? For help with math skills, you may want to review. Express your answer to two significant figures and include the appropriate units. The Vector Crss Product HA d = Value Units Submit Request Answer Provide Feedback Figure < 1 of 1> 3.0 m

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 22P: The fishing pole in Figure P10.22 makes an angle of 20.0 with the horizontal. What is the torque...

See similar textbooks

Similar questions

A stepladder of negligible weight is constructed as shown in Figure P10.73, with AC = BC = ℓ. A painter of mass m stands on the ladder a distance d from the bottom. Assuming the floor is frictionless, find (a) the tension in the horizontal bar DE connecting the two halves of the ladder, (b) the normal forces at A and B, and (c) the components of the reaction force at the single hinge C that the left half of the ladder exerts on the right half. Suggestion: Treat the ladder as a single object, but also treat each half of the ladder separately. Figure P10.73 Problems 73 and 74.
A uniform beam resting on two pivots has a length L = 6.00 m and mass M = 90.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot located a distance = 4.00 m from the left end exerts a normal force n2. A woman of mass m = 55.0 kg steps onto the left end of the beam and begins walking to the right as in Figure P10.28. The goal is to find the womans position when the beam begins to tip. (a) What is the appropriate analysis model for the beam before it begins to tip? (b) Sketch a force diagram for the beam, labeling the gravitational and normal forces acting on the beam and placing the woman a distance x to the right of the first pivot, which is the origin. (c) Where is the woman when the normal force n1 is the greatest? (d) What is n1 when the beam is about to tip? (e) Use Equation 10.27 to find the value of n2 when the beam is about to tip. (f) Using the result of part (d) and Equation 10.28, with torques computed around the second pivot, find the womans position x when the beam is about to tip. (g) Check the answer to part (e) by computing torques around the first pivot point. Figure P10.28
Answer yes or no to the following questions. (a) Is it possible to calculate the torque acting on a rigid object without specifying an axis of rotation? (b) Is the torque independent of the location of the axis of rotation?
The fishing pole in Figure P10.22 makes an angle of 20.0 with the horizontal. What is the torque exerted by the fish about an axis perpendicular to the page and passing through the anglers hand if the fish pulls on the fishing line with a force F=100N at an angle 37.0 below the horizontal? The force is applied at a point 2.00 m from the anglers hands. Figure P10.22
Assume a single 300-N force is exerted on a bicycle frame as shown in Figure OQ10.5. Consider the torque produced by this force about axes perpendicular to the plane of the paper and through each of the points A through E, where E is the center of mass of the frame. Rank the torques A, B, C, D, and E from largest to smallest, noting that zero is greater than a negative quantity. If two torques are equal, note their equality in your ranking. Figure OQ10.5
A 49.4 kg man walks to the end of a 34.0 kg, 12.6 m long diving board, that is being supported at two points separated by a distance X = 3.73 m. How big of a force is needed on the far left side, so that the diver can make it to the end of the board? What is the force on the support closer to the center of the board, when the diver is at the end of the board?
A uniform beam resting on two pivots has a length L = 6.00 m and mass M = 90.0 kg. The pivot under the left end exerts a normal force η1 on the beam, and the second pivot located a distance ℓ = 4.00 m from the left end exerts a normal force η2. A woman of mass m = 55.0 kg steps onto the left end of the beam and begins walking to the right as shown. The goal is to find the woman’s position when the beam begins to tip. (a) What is the appropriate analysis model for the beam before it begins to tip? (b) Sketch a force diagram for the beam, labeling the gravitational and normal forcesacting on the beam and placing the woman a distance x to the right of the first pivot, which is the origin. (c) Where is the woman when the normal force η1 is the greatest? (d) What is η1 when the beam is about to tip? (e) Use as shown to find the value of η2 when the beam is about to tip.(f) Using the result of part (d) and as shown, with torques computed around the second pivot, find the woman’s position x…
A beam resting on two pivots has a length of L = 6.00 m and mass M = 92.0 kg.The pivot under the left end exerts a normal force n1on the beam, and the second pivot placed a distance ℓ = 4.00 m from the left end exerts a normal force n2. A woman of mass m = 62.5 kg steps onto the left end of the beam and begins walking to the right as in the figure below. The goal is to find the woman's position when the beam begins to tip. (a) Where is the woman when the normal force n1 is the greatest? x = ____m(b) What is n1 when the beam is about to tip?____ N (c) Use the force equation of equilibrium to find the value of n2 when the beam is about to tip.____ N
An 8.00 m long beam with a mass of 8.70 kg is suspended horizontally from a post, as shown. The left end of the beam is attached to a frictionless hinge on the vertical post that allows the beam to rotate up and down freely. The right end of the beam is supported by a wire that runs to the top of the post. The wire makes a 50° angle with the vertical post. The beam's shape is symmetric and it is made of a homogeneous material so that its center of mass is located at its geometric center. What tension in the wire is required to support the beam horizontally?
An irregularly shaped object 10 m long is placed with each end on a scale. If thescale on the right reads 69 N and the scale on the left reads 93 N, how far fromthe left is the center of gravity.A) 4.3 m, B) 13 m, C) 7.4 m, D) 5.7 m
A proffesors office door is 1.3m wide, 2.3m high, 4.0cm thick, has a mass of 25kg, and pivots on friction less hinges. What is the smallest magnitude force that you need to apply to the door to give it an angular acceleration of 2 rad/s.
The meterstick weighs 10N. If a rock hangs on one end and the whole system is balanced at the 20 cm - mark as shown in the sketch, what must be the mass of the rock?