A 40 mm diameter plastic sphere (SG = 1.5) settles in a still water body. The required chart is as follows. a. Find the terminal velocity at which the sphere sinks b. What is the Drag coefficient CD? c. If the sphere starts to rotate counterclockwise at a speed of 50 revolutions per second, find the magnitude and direction of the Magnus force on it

A 40 mm diameter plastic sphere (SG = 1.5) settles in a still water body. The required chart is as follows. a. Find the terminal velocity at which the sphere sinks b. What is the Drag coefficient CD? c. If the sphere starts to rotate counterclockwise at a speed of 50 revolutions per second, find the magnitude and direction of the Magnus force on it

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

A horizontal force P acts on the top of the 30 N block having a width of 25 cm and a height of 50 cm. If the coefficient of friction between the block and the plane is 0.33. a. What is the value of P for motion to impend? b. Is the motion will impend due to overturning?
The collar of 5 kg mass shown in the figuremoves on a parabolic bar on a horizontal plane.The collar has a speed of 8 m/sec when it is atpoint B. Determine the friction force betweenthe collar and the bar if the coefficient offriction is 0.25. Formula of the parabolic bar isshown in the figure
Q3: Three forces are acting on a steel plate with 4m length by 4m width shown in figure. These three forces are required to cause a horizontal resultant acting through point A. If F = 405N, %3D 1) The value of horizontal resultant R is: E D P. B.
A 500 N block is resting on an inclined plane and is subjected to a constant force of 600N acting parallel to the inclined plane. After the block has moved 3 m from rest along the inclined plane the force 600N is removed. The inclined plane has a slope of three vertical to four horizontal. Coefficient of friction is 0.20 a. Which is the following gives the distance that the black will move further along the inclined plane until it will stop? b. Which of the following gives the velocity of the block when this for 600 Newton was removed? c. Which of the following gives the velocity of the block when it returns to its initial position?
1. For the shown conic body which rotating with constant angular velocity 10 rad/s, find the torque which effected by viscosity of the ol that surrounding the conic body. Take: Radius of the cone is 2 in Height of the cone is 4 in Oil viscosity is 3.125x107 Ib.s/in? Answer : Torque =0.02535 Ib. In P10 rad/k 0.01-in film 0.01 in
5. A circular plate made up of steel sg= 7.85 is submerged in a fluid of sg=1.029. If the force acting on one side of the plate is 69lb and the upper tip of the plate from the fluid surface is unknown, determine the diameter of the circular plate in ft and the location of force from the fluid surface in ft. Eccentricity is 0.04.
5. A solid steel disk E=200X10^9 N/m^2 start rotation from the rest with constant acceleration. When the disk changed an angular position by 180 degrees, a small disk attachment (hummer) hit an aluminum rod E = 70 x 10^9 N/m^2. At that moment the angular velocity was 2500 rad/s. Diameter of the aluminum rod is 0.1 m. Please, find strain in the rod. R= 2m Rad Wo = O lad diolm We=2500 A- - R. hummeR Eslal-200 *10 Ene %3D Al
A uniform rod KJ of weight w shown in the figure rests against a frictionless vertical wall at the point K and a rough horizontal surface at point J. It is given that w = 10 kN, a = 4 m and b = 3 m. K J The minimum coefficient of static friction that is required at the point J to hold the rod in equilibrium is .. (round off to three decimal places)
The angular velocity of rod OB varies as tetha = 8 - 12t^2 rad/s where t is in seconds. Compute the magnitude of the acceleration of point B at (a) t = 0; and (b) t= 1.0s.
3. A rigid bars shown in the figure are separated by a roller at C and pinned at A and D. A steel rod at B helps support the load of 50 KN. Compute the vertical displacement of the roller at C Answer: displacement = 2.82 mm E 200 X 10° N/m? %3D A = 300 mm? 50 kN L = 3 m 2 m 2 m A B 3 m 1.5 m II ()
1. A 15-lb block A rests on a 35-lb wedge B as shown in the figure. Determine the acceleration of the wedge when the system is released from rest. Neglect friction. B 25°
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