A number of forces acting at a point will be in equilibrium if_____________________?

Byadmin January 25, 2019August 16, 2021

A number of forces acting at a point will be in equilibrium if_____________________?

A. their total sum is zero
B. two resolved parts in two directions at right angles are equal
C. sum of resolved parts in any two per-pendicular directions are both zero
D. all of them are inclined equally
E. none of the above

Engineering Mechanics | Equilibrium Of A Rigid Body

A Russell’s traction is used for immobilizing femoral fractures C. If the lower leg has a weight of 8 lb, determine the weight W that must be suspended at D in order for the leg to be held in the position shown. Also, what is the tension force F in the femur and the distance which locates the center of gravity G of the lower leg? Neglect the size of the pulley at B.

Question: A Russell’s traction is used for immobilizing femoral fractures C. If the lower leg has a weight of 8 lb, determine the weight W that must be suspended at D in order for the leg to be held in the position shown. Also, what is the tension force F in the femur and the distance which locates the center of gravity G of the lower leg? Neglect the size of the pulley at B.
[A].

x = 1.44 ft, w = 10.8 lb, F = 12.61 lb
[B].
x = 1.33 ft, w = 15.76 lb, F = 20.0 lb
[C].
x = 1.56 ft, w = 9.75 lb, F = 12.69 lb
[D].
x = 0.869 ft, w = 6.44 lb, F = 5.03 lb

Answer: Option A

Explanation:

No answer description available for this question.

Read More A Russell’s traction is used for immobilizing femoral fractures C. If the lower leg has a weight of 8 lb, determine the weight W that must be suspended at D in order for the leg to be held in the position shown. Also, what is the tension force F in the femur and the distance which locates the center of gravity G of the lower leg? Neglect the size of the pulley at B.
Engineering Mechanics

According to Lami’s theorem___________________?

According to Lami’s theorem___________________?

A. three forces acting at a point will be in equilibrium
B. three forces acting at a point can be represented by a triangle, each side being proportional to force
C. if three forces acting upon a particle are represented in magnitude and
direction by the sides of a triangle, taken in order, they will be in equilibrium
D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
E. none of the above

Read More According to Lami’s theorem___________________?
Engineering Mechanics | Mechanical Engineering

One kg force is equal to

Question: One kg force is equal to
[A].

7.8 N
[B].
8.9 N
[C].
9.8 N
[D].
12 N

Answer: Option C

Explanation:

No answer description available for this question.

Read More One kg force is equal to
Engineering Mechanics

Center of percussion is___________________?

Center of percussion is___________________?

A. the point of C.G.
B. the point of metacentre
C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
D. point of suspension
E. the point in a body about which it can rotate horizontally and oscillate under the influence of gravity

Read More Center of percussion is___________________?
Engineering Mechanics | Mechanical Engineering

A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.

Question: A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
[A].

True
[B].
False

Answer: Option A

Explanation:

No answer description available for this question.

Read More A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
Engineering Mechanics | Equilibrium Of A Particle

Determine the force F needed to hold the 4-kg lamp in the position shown.

Question: Determine the force F needed to hold the 4-kg lamp in the position shown.
[A].

F = 39.2 N
[B].
F = 68.0 N
[C].
F = 34.0 N
[D].
F = 19..62 N

Answer: Option A

Explanation:

No answer description available for this question.

Read More Determine the force F needed to hold the 4-kg lamp in the position shown.

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