EIT Statics and Dynamics 1

Question 1

For a body in static equilibrium, the sum of all forces must equal:

Accepted Answer

Zero

Answer

Static equilibrium requires ΣF = 0 (net force) and ΣM = 0 (net moment), meaning all forces and moments balance.

Question 2

The moment of a force about a point is calculated as:

Accepted Answer

Force × perpendicular distance from the point to the line of action

Answer

Moment (torque) M = F × d, where d is the perpendicular distance from the pivot to the line of action of the force.

Question 3

What is the centroid location of a uniform rectangular plate with width w and height h?

Accepted Answer

At the center (w/2, h/2)

Answer

For a uniform rectangle, the centroid is at the geometric center, at distances w/2 and h/2 from each respective side.

Question 4

Newton's second law for a particle states:

Accepted Answer

F = ma

Answer

Newton's second law: net force F = ma, where m is mass and a is acceleration.

Question 5

A 500N block rests on a horizontal surface with μ_s = 0.4. What is the maximum static friction force?

Accepted Answer

200 N

Answer

Maximum static friction f_s = μ_s × N = 0.4 × 500 = 200 N.

EIT - Engineering in Training Practice Test