Four people are attempting to move a stage platform across the floor. If they exert the horizontal forces shown, determine (a) the equivalent force-couple system at O and (b) the points on the x- and y-axes through which the line of action of the single resultant force. R passes. Assume F₁-71 lb, F2-61 lb, F3-39 lb. F4-51 lb, a-74 in., b-60 in., and 0 = 47° B 0 F₁ Answers: (a) The force-couple system at O: R= i+ j) lb Mo- k lb-in. (b) The line of action of the single resultant R: On the x-axis xi On the y-axis y i in. in.

Four people are attempting to move a stage platform across the floor. If they exert the horizontal forces shown, determine (a) the equivalent force-couple system at O and (b) the points on the x- and y-axes through which the line of action of the single resultant force. R passes. Assume F₁-71 lb, F2-61 lb, F3-39 lb. F4-51 lb, a-74 in., b-60 in., and 0 = 47° B 0 F₁ Answers: (a) The force-couple system at O: R= i+ j) lb Mo- k lb-in. (b) The line of action of the single resultant R: On the x-axis xi On the y-axis y i in. in.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 76PQ: Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to...

See similar textbooks

Similar questions

Four people are attempting to move a stage platform across the floor. If they exert the horizontal forces shown, determine (a) the equivalent force-couple system at O and (b) the points on the x- and y-axes through which the line of action of the single resultant force R passes. 72 lb 69 lb 61" 75 lb- 74" 34 lb Answers: (a) The force-couple system at O: R= 1) Ib k Ib-in. (b) The line of action of the single resultant R On the x-axis x = Jin. On the y-axis y =
SAQ 1 1.2 m D 80 kN m An 80-kn. m couple shown in the plate is caused by a pair of parallel forces of magnitude F (not shown). 1.6 m Determine: a) the smallest possible value of F, and b) the value of F if the forces act at points A and C and are parallel to the dashed line shown at A. А В 60°
Three friends ride a Ferris wheel with a diameter of 46m. Their combined mass with each car of the Ferris wheel is 435 kg. When their car is at position A, the steel support applies 502N force at the car at an angle of 40 degrees with the horizontal. What is the speed of the cars?
a bridge across a small stream is made by supporting a 10m long log with a mass of 75kg with ropes tied at the ends of the log to the tree on the banks. the rope on the right makes a 25 degree angle with the ground. the rope on the left makes a 20 degree angle with the ground. a 25kg child us standing 7.5 m from the left bank. write the net force equation for the y direction. write the net force equation for the x direction. write the torque equation (use the left end of the log as the axis of rotation).
A beam AB of negligible mass is subject to the loading shown. Find the distance the resultant of the 10kN point force and the distributed force acts from point A. 10 kN 6 kN/m C D 5 m 1.5 m 1.5 m 1.5 m- |--1.5m- O 2.75 m O2.22 m 3.0 m O2.82 m B
The slope of the 4.1 kN force F is specified as shown in the figure. Express F as a vector in terms of the unit vectors i and j. Assume a = 9, b = 3. Answer: F = (i it i j) KN
Michael Jordan won the 1987 NBA SlamDunk Contest. While doing a slam dunk in thelocal motion capture lab, an average verticalground reaction force of 2900 N (Normal Force) acted on Jordan's take off foot for 0.21s during the upward phase of his slam dunk jump. a) What would his take-off velocity off the ground be if his mass was 95 kgb) If Jordan's center of gravity (COG) was 1.3 meters above the ground when his foot came off the ground, what is the maximum height his CoG reaches during the jump.
a) Find the equivalent resultant force-couple system acting at point A. b) If the force system is to be replaced by an equivalent force, how far from point A should the equivalent force be? 200 lb A -3 ft- -3 ft- ↓ -3 ft 5 30° 50 lb 3 100 lb Answers: (a) R = 184 lb, 62.5° N of E, C = 509.7 lb-ft, (b) 3.12 ft
Problem Two-block system is given below. The mass of block one is m=4 kg and the mass of block two is m, -8 kg A force is applied on m; to start the motion of block two knowing that block 1 doesn't move The coefficient of static friction for all surfaces is given as 0.4 (Take g-9.8 m/s). Tension force Fapplied m. Calculate the magnitude of the maximum static friction force Fel exerted by the ground surtace on block 2 Calculate the magnitude of the applied force |Fa that is needed just to start the motion ot the block 2 IFnta
The crate of mass m= 31 kg is at rest at A on the theta=7o incline. The coefficients of static and kinetic friction between the crate and the incline are mus=0.385 and muk=0.308 a) What will the crate’s final velocity be? b) If energy is lost or increased, where did it go?
A uniformly-dense equilateral triangle with weights hanging from each vertex is fixed at its center of mass as shown below: The triangle has a mass of 2kg and each side has a length of 0.50 meters, and it is held so that the vertex connected to F, is at an angle of 45° from the horizontal. All weights hang vertically downwards, where F,-25 N. F2-15 N and F3-10 N. What is the magnitude of the angular acceleration when the triangle is released and allowed to rotate, in rad/s? Justify your answer with your rationale and equations used. Irtangle MI Hint: Be careful with the angles you use for your calculation! Remember what the angle between vertexes of an equilateral triangle are. 63 梦 00 99
The 500-N block on an incline is acted upon by a force P at an angle from the horizontal. The coefficient of static friction is 0.25. If 0 = 0 deg, compute the value of force P necessary to (a) just start the block up the incline and (b) just prevent motion down the incline. 500 N P