The 300-N block in the figure is at rest on the rough horizontal plane before the force P is applied at t = 0. The magnitude of P is 80t N, where t is the time in seconds, and its direction is constant. The coefficients of static and kinetic friction are u, = 0.40 and µ̟ = 0.20, respectively. Which of the following most nearly gives velocity of the block after 5 seconds? 300 N P = 80t N

The 300-N block in the figure is at rest on the rough horizontal plane before the force P is applied at t = 0. The magnitude of P is 80t N, where t is the time in seconds, and its direction is constant. The coefficients of static and kinetic friction are u, = 0.40 and µ̟ = 0.20, respectively. Which of the following most nearly gives velocity of the block after 5 seconds? 300 N P = 80t N

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

6/47 A block of mass mo is placed between the vertical wall and the upper end A of the uniform slender bar of mass m. If the coefficient of static friction is µg be- tween the block and the wall and also between the block and the bar, determine a general expression for the minimum value 0min Oof the angle 0 for which the block will remain in equilibrium. Evaluate your expression for the conditions µ = 0.5 and %3D т (a) mo 0.1, m (b) mo 1, and m (c) mo 10. %3D For each case, state the minimum coefficient of sta- tic friction (u)B necessary to prevent slippage at B. Ans. (a) 0min = 61.2°, (µ,)B = 1.667 (unusual!) (b) 0min = 45°, (µ)B = 0.667 (c) 0min = 10.30°, (µ,)B = 0.0952 %3D %3D %3D %3D %3D mo m (Ha)B Problem 6/47
Derive the equation of the resonance frequency of the uniform cantilever beam shown below by using method of conservation of energy. Solution procedure must be the principle of conservation of energy! Umax, maximum strain energy is equal to max. kinetic energy, Tmax of vibrating body. Tmax 1/2 S. y³²m dx U= 10. M(x)2 EI
Calculate the minimum force P required to keep the 0.294 KN rod AB from sliding. The contact surface at B is smooth, while the static friction coefficient between the rod and the wall at A is ms = 0.2 Answer = . _N A O 180 165 O 150 3 m O 175 O 160 O 155 В 170 185 - 4 m·
The cross-sectional area of each clamp forming a fixed-supported cage system from points C and D shown in the figure below is 300 mm² and a modulus of elasticity is 105 GPa. A single force P-90 KN acts on the Kafcs system from point A as shown in the figure. Determine the vertical displacement at point A using the work-energy method. 2 m B P 1.5m
Problem 1. Determine the smallest force P needed to lift block B. The coefficient of static friction between A and C and between B and D is us = 0.3, and between A and B is µ's= 0.4. Neglect the weights of A and B. 3000 Ib B 15 P- A C
Question 5 T/2 В 1200 Nm A homogeneous steel shaft (G=83GPA) is loaded as shown in the above Figure. Assuming T = 300 N-m, determine the torsional force in N-m in Member BC. Note: Include sign (+/-), assuming the direction of Torsion (T) at D is positive Given: AB: Length = 1.75m, Diameter = 75mm BC: Length = 1.50m, Diameter = 60mm AB: Length = 1.00m, Diameter = 40mm
Q.3. a- A rectangular plate simply supported along its edges and subjected to a uniform of intensity po: 1. Determine the value of the maximum deflection if b 2a. Compare the result with W= 0.01013 2. Determine the expression for shear force Qx for the plate. load
The figure shown is a cross-section of the beam on the fixed support of a propped beam that has a moment of 72 kN-m. Determine the following: a. The location of the centroid from the extreme tension fiber. The moment of Inertia of the cross-section. The bending stress at the extreme compression fiber. d. Show the force and moment check of the beam. b. c. 70 mm 50 mm- 100 mm: 50.0000 130 mm- 100.0000 -350 mm- 100 mm-
a) If the beam AD is loaded as shown in Figure Q4(a), determine the horizontal force P which must be applied to the wedge in order to remove it from under the beam. The coefficients of static friction at the wedge's top and bottom surfaces are ucA = 0.25 and HCB = 0.35, respectively. If P = 0, is the wedge self-locking? Neglect the weight and size of the wedge and the thickness of the beam.
Problem-1: The beam shown in figure below is subjected to a vertical distributed load at BC of 10 kN/m and a concentrated load at free end at D of 30 kN. Using the slope deflection method, determine the moment at the fixed end support A, the roller support B and C. Take I= 511062 mm“, E = 200 GPa. 30 kN 10 kN/m A -6 m- -9 m- -4 m- Solution: MAR -13.7 kN m Mac 27.5 kN-m 5 MBA = -27.5 kN m Mca -120 kN -m
The block of weight W2 is being held in its position by two cylindrical rollers resting on inclinedsurfaces. All contact surfaces have a coefficient of static friction, us = 0.36. W1 = 400KN. a. What maximum value of W2 it can be before slipping of the block happens?b. Determine the normal force reaction against the inclined surfaces.
The block slides at a constant speed on a surface with friction. In each case, the water jet has velocity 50 m/s and cross-sectional area 5 cm2, and the block has velocity 25 m/s. In case (a), the jet is deflected to an angle of 60° from horizontal relative to the block, as shown. In case (b), the jet is deflected 180°. Calculate the friction force in each case. Apply both a moving Reference Frame (RF) and a fixed RF. Use the VSM. Check that both RFs give the same friction force for a given case. (We would not expect the two cases to have the same friction force!) Density of water is 1000 kg/m3. All jets are open to the atmosphere. case (a) 60° case (b)