Engineering Mechanics

Question: In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will
[A].

increase

[B].

decrease

[C].

remain the same

Answer: Option B

Explanation:

No answer description available for this question.

Question: A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
[A].

m1/m2

[B].

m1.g sin α

[C].

m1.m2/m1+m2

[D].

Answer: Option D

Explanation:

No answer description available for this question.

Question: A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
[A].

increase

[B].

decrease

[C].

not be effected

Answer: Option A

Explanation:

No answer description available for this question.

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.