Mechanics: MCQ Test (25 questions)

Question 1 of 25

Why do we slip on muddy roads?

Adue to gravitational force
Bdue to relative velocity
Cdue to lack of friction
Ddue to excessive friction

Question 2 of 25

Ampere is the unit of measurement of what?

Avoltage
Bcurrent
Cresistance
DPower

Question 3 of 25

Automatic wristwatches are powered by

Afrom cramps
Bfrom the battery
Cfrom liquid crystals
DBy the various movements of our hands

Question 4 of 25

Which of the following statements is correct for a simple harmonic oscillator?

AThe acting force is directly proportional to the displacement from the mean position and is in the same direction
BThe acting force is directly proportional to the displacement from the mean position and is in the opposite direction.
CThe acceleration of the pendulum is constant
DThe velocity of the oscillator is not periodic

Question 5 of 25

At what angle should a cricket ball be hit so that it travels the maximum distance?

Aan angle of 60° with the horizontal
Ban angle of 45° to the horizontal
Can angle of 30° with the horizontal
Dan angle of 15° with the horizontal

Question 6 of 25

Bernoulli's principle states the conservation of which of the following?

AMass
Benergy
CLinear momentum
Dpressure

Question 7 of 25

When the Fortin barometer is taken to a high mountain, the mercury in the tube falls because-

AThe air here is relatively light.
BWith decrease in temperature the mercury level decreases
CThe atmospheric pressure there is low
Dthere the surface tension decreases

Question 8 of 25

Which of the following is most elastic?

Arubber
Bwet soil
CSteel
Dplastic

Question 9 of 25

A person climbing a hill leans forward because-

Acan walk fast
BReduce the chance of slipping
Cto conserve power
DTo increase durability

Question 10 of 25

AccelerationknowntoOfCorrectFormulaWho,LikeIs ,

Aa=(vu)/t
Ba=u+vt
Ca=(v+u)/t
Da=(v+u)/2

Question 11 of 25

Often, light thatched or tin roofs are blown away during a strong storm because-

ARoofs have complex shapes
BRoofs are not tightly fastened
CHigh velocity air flowing over the roof creates pressure on the roof surface and the pressure below the roof remains normal.
DThatched roofs blow away by strong winds

Question 12 of 25

Why does an iron nail float in mercury, while it sinks in water?

AThe tendency of iron to react chemically with mercury is due to comparison with water.
BIron weighs more than water and less than mercury
CThe density of iron is greater than that of water and less than that of mercury.
Dmercury is heavier than water

Question 13 of 25

Why does a swimmer find it easier to swim in sea water than in river water?

AReduces pollution in sea water
BSea waves help a swimmer to float
CSea water has a higher density than ordinary water.
DThe ocean has a larger volume of water

Question 14 of 25

If the velocity of a moving object is doubled, then its-

AThe acceleration doubles
Bthe kinetic energy doubles
Cthe kinetic energy becomes four times
DThe load doubles.

Question 15 of 25

What is the unit of measurement of 'Hertz'?

Awavelength
Bclarity of waves
Cintensity of waves
Dfrequency of waves

Question 16 of 25

How much of an iceberg floating in the ocean remains above the sea surface?

A0.11111111111111
B0.1
C0.16666666666667
D0.25

Question 17 of 25

The ball dropped from an artificial satellite revolving around the Earth is-

Awill go to earth
Bwill go to the moon
Cwill fall to the earth
DIt will continue to revolve around the Earth in its orbit with the same periodicity as the satellite

Question 18 of 25

A girl is swinging while sitting on a swing. When the girl stands up, the time period of the oscillations is-

Awill decrease
Bwill be more
Cwill depend on the height of the girl
Dwill remain unchanged

Question 19 of 25

Climbing stairs consumes more energy because-

AThe person works against gravity.
Ba person works against gravity
CThe person acts in the direction of gravity
DThe person does not do any work

Question 20 of 25

If the linear momentum of a moving body is doubled by the application of a force, then its kinetic energy-

Awill increase eightfold
Bwill increase fourfold
Cwill double
Dwill remain the same

Question 21 of 25

It is more difficult to walk on snow than on the road because-

AThe snow is harder than the road
BThe road is hard with snow
CThe snow does not react when we push it with our feet.
DIce has less friction than road.

Question 22 of 25

Hooke's principle is related to which of the following?

Aliquid pressure
Belasticity
Cradioactivity
DNone of these

Question 23 of 25

It is easier to roll a wooden cylindrical barrel than to drag it because-

AWhen it is pulled, the weight of the object acts
BThe force of friction in the rolling state is much less than the force of friction in the sliding state.
CThe barrel has a larger surface area in contact with the road when towing.
DAny option other than the above

Question 24 of 25

Which of the following units measures the same quantity as the SI unit 'Pascal'?

AJoule
BWatt
CTor
DNewton

Question 25 of 25

The SI unit of 'Young's modulus of elasticity' is-

ADyne/cm.
BNewton/m
CNewton/m2
Dm.2/From