Mechanical Engineering

Question: If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be
[A].

same

[B].

half

[C].

double

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be
[A].

same

[B].

half

[C].

double

Answer: Option A

Explanation:

No answer description available for this question.

Question: A force while acting on a body may
[A].

change its motion

[B].

balance the forces, already acting on it

[C].

give rise to the internal stresses in it

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: In the shown figure, the tension (T) in the string will be
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Question: If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is
[A].

g/2

[B].

g/3

[C].

g/4

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: A lift moves downwards with an acceleration of 9.8 m/s2. The pressure exerted by a man on the floor of the lift is zero.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m / s2 in the direction of which it acts.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: If a number of forces are acting at a point, their resultant is given by
[A].

(∑V)2 + (∑H)2

[B].

[C].

(∑V)2 +(∑H)2 +2(∑V)(∑H)

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Question: 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,
[A].

P + m.a = 0

[B].

P – m.a = 0

[C].

P x m.a = 0

[D].

P/m.a = 0

Answer: Option B

Explanation:

No answer description available for this question.

Question: D’ Alembert’s principle basically depends upon Newton’s second law of motion.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.