251. In a framed structure, as shown in the below figure, the force in the member BC is
W/3 (compression)
W/3 (tension)
2W/3 (compression)
2W/3 (tension)
✅ The correct answer is option D.
Engineering Mechanics MCQs
252. If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
equal to
less than
greater than
✅ The correct answer is option A.
253. If the body falls freely under gravity, then the gravitational acceleration is taken as
+8.9 m/s2
-8.9 m/s2
+9.8 m/s2
-9.8 m/s2
✅ The correct answer is option C.
254. If P is the force acting on the body, m is the mass of the body and a is the acceleration of the body, then according to Newton’s second law of motion,
P + m.a = 0
P – m.a = 0
P x m.a = 0
P/m.a = 0
✅ The correct answer is option B.
255. The maximum velocity of a particle moving with simple harmonic motion is
ω
ωr
ω2r
ω/r
✅ The correct answer is option B.
256. For any system of coplaner forces, the condition of equilibrium is that the
algebraic sum of the horizontal components of all the forces should be zero
algebraic sum of the vertical components of all the forces should be zero
algebraic sum of moments of all the forces about any point should be zero
all of the above
✅ The correct answer is option D.
258. Energy may be defined as the capacity of doing work.
Correct
Incorrect
✅ The correct answer is option A.
259. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.
TRUE
FALSE
✅ The correct answer is option A.
260. Moment of inertia of a circular section about its diameter (d) is
πd3/16
πd3/32
πd4/32
πd4/64
✅ The correct answer is option D.