2) Find the resultant of the three forces in the figure below (add them together). 1) Complete the following table 2 m 2 m Property MLT FLT B Angular Speed Energy FE = 350 N. 3 m Fc= 400 N F 400 N LT-1 2 m 3 m Weight Density Pressure 6) A rigid body is rotating about an axis parallel to the vector à = 21 + 4j – 2k at a rate of 5 rad/s. Find the velocity (velocity is a vector!!) of a point located 7 meters in the x direction Find the total moment of force about point O. Notice that there are 2 forces creating moments away from the axis. A force F has direction cosines cosa = 0.5, cosß = 0.707. and cosy = -0.707 and a F = {-300i + 150j + 200k} N magnitude of 150N, Find the moment this force creates about the point (2,6,-3)ft if the force 1 m 2 m acts at (1,2,1)ft. 1.5 m В The formula F =pv²CpA gives the drag force on an object flying through a fluid (like air). Calculate the drag force on an object flying through air at 35,000ft altitude, where the density of F2 = {-450k} N air is p = 0.0237m, at a speed of v = 575", when the area of the cross section is A = 25 ft? and the coefficient of drag is Cp = 0.16 A co00 C

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2)
Find the resultant of the three forces in the figure below (add them together).
1)
Complete the following table
2 m
2 m
E
Property
MLT
FLT
Angular Speed
Energy
F = 350 N
3 m
Fc = 400 N4
FL-4T2
FB=400 N
LT-1
2 m
3 m
Weight Density
Pressure
3)
A rigid body is rotating about an axis parallel to the vector à = 2î + 4j – 2k at a rate of
5 rad/s. Find the velocity (velocity is a vector!!) of a point located 7 meters in the x direction
6)
Find the total moment of force about point O. Notice that there are 2 forces creating moments
away from the axis.
Z.
4)
A force F has direction cosines cosa = 0.5, cosß = 0.707. and cosy = -0.707 and a
magnitude of 150N. Find the moment this force creates about the point (2,6,-3)ft if the force
F1 = {-300i + 150j + 200k} N
1 mu 2 m
acts at (1,2,1)ft.
1.5 m
В
5)
The formula F = pv?CpA gives the drag force on an object flying through a fluid (like air).
Calculate the drag force on an object flying through air at 35,000ft altitude, where the density of
F2 = {-450k} N
air is p = 0.0237m at a speed of v = 575", when the area of the cross section is
A = 25 ft? and the coefficient of drag is Cp = 0.16
5280 ft = 1 mile,
3600s = 1 hour,
1 slug = 32.2 lbm
7)
An object weighs 50 lb on mars where gravity is 3.71
a) What is its mass in slugs on mars?
b) What is its mass in kg on the Earth?
c) How much does it weigh in Ib on the Earth where g = 32.2?
3.28 ft = 1 m, 14.6kg = 1 slug, 4.45N = 1 lb
8)
In Mechanics of Materials (ENGR 225) we will learn that the angle of twist of a shaft that has a
torsional moment of force applied to it is given by ø =, where ø is an angle, T is a moment of
GJ'
force, L is a length (go figure), and J is the polar area moment of inertia, given in units of in*.
Find the dimensions of G (called the shear modulus) if this equation is dimensionally
homogeneous.
Transcribed Image Text:2) Find the resultant of the three forces in the figure below (add them together). 1) Complete the following table 2 m 2 m E Property MLT FLT Angular Speed Energy F = 350 N 3 m Fc = 400 N4 FL-4T2 FB=400 N LT-1 2 m 3 m Weight Density Pressure 3) A rigid body is rotating about an axis parallel to the vector à = 2î + 4j – 2k at a rate of 5 rad/s. Find the velocity (velocity is a vector!!) of a point located 7 meters in the x direction 6) Find the total moment of force about point O. Notice that there are 2 forces creating moments away from the axis. Z. 4) A force F has direction cosines cosa = 0.5, cosß = 0.707. and cosy = -0.707 and a magnitude of 150N. Find the moment this force creates about the point (2,6,-3)ft if the force F1 = {-300i + 150j + 200k} N 1 mu 2 m acts at (1,2,1)ft. 1.5 m В 5) The formula F = pv?CpA gives the drag force on an object flying through a fluid (like air). Calculate the drag force on an object flying through air at 35,000ft altitude, where the density of F2 = {-450k} N air is p = 0.0237m at a speed of v = 575", when the area of the cross section is A = 25 ft? and the coefficient of drag is Cp = 0.16 5280 ft = 1 mile, 3600s = 1 hour, 1 slug = 32.2 lbm 7) An object weighs 50 lb on mars where gravity is 3.71 a) What is its mass in slugs on mars? b) What is its mass in kg on the Earth? c) How much does it weigh in Ib on the Earth where g = 32.2? 3.28 ft = 1 m, 14.6kg = 1 slug, 4.45N = 1 lb 8) In Mechanics of Materials (ENGR 225) we will learn that the angle of twist of a shaft that has a torsional moment of force applied to it is given by ø =, where ø is an angle, T is a moment of GJ' force, L is a length (go figure), and J is the polar area moment of inertia, given in units of in*. Find the dimensions of G (called the shear modulus) if this equation is dimensionally homogeneous.
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