Applied Mechanics MCQs

Question 1

When a body slides down an inclined surface, the acceleration (f) of the body, is given by

Accepted Answer

f g sin 0

Answer

f = g

Answer

f = g cos 0

Answer

f = g tan O.

Question 2

A train weighing 196 tonnes experiences a frictional resistance of 51V22 per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 kin/hour. The speed of the train after running 1 km down the slope, is

Accepted Answer

5- Irr) m/sec

Answer

lONIK mIsec

Answer

5V8- m/sec

Answer

a - m/sec.

Question 3

A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be

Accepted Answer

0.05 m/sec

Answer

0.01 in/sec

Answer

1.00 in/sec

Answer

1.5 m/sec.

Question 4

The unit of moments in M.K.S system, is

Accepted Answer

kgm

Answer

kg/m2

Answer

kg/sec2

Answer

kg/sec.

Question 5

The characteristic of a couple, is :

Accepted Answer

all the above.

Answer

algebraic sum of forces, constituting a couple is zero

Answer

algebraic sum of moments of the forces, constituting a couple, about any point, is same

Answer

a couple can be balanced only by a couple but of opposite sense

Question 6

The velocity of a moving body, is

Accepted Answer

a vector quantity

Answer

a scalar quantity

Answer

a scalar as well as a vector quantity

Answer

none of these.

Question 7

The force which produces an acceleration of 1 m/sec2 in a mass of one kg, is called

Accepted Answer

Netwon

Answer

dyne

Answer

joule

Answer

erg.

Question 8

A satellite goes on moving along its orbit round the earth due to

Accepted Answer

centrifugal force

Answer

gravitational force

Answer

centripital force

Answer

none of these.

Question 9

Work may be defined as

Accepted Answer

force x distance

Answer

force x velocity

Answer

force x acceleration

Answer

none of these.