Question # 1

Which of the following is an example of negative work.

Choose an answer

a thrown up cricket ball

Grass mower

A car on road

Bucket in the well

The angle subtended at the centre of a circle by an arc equal to its radius is equal to.

Choose an answer

One rotation

One radian

One degree

One revolution

The unit of energy are the same as that of

Choose an answer

Force

Power

Work

Efficiency

A 100 kg box is pulled 10 m across a frictionless horizontal surface by a 50 N force The change in the P.E. of the box a

Choose an answer

0 J

2 J

20 J

50 J

A fixed pulley is emplyed to

Choose an answer

Do some work

Change the directionof force

Do more work with the same force but without using the pulling

Have mechanical advantage greater than 1

When a man jumps off the ground, the reaction force of the ground is.

Choose an answer

Equal to the weight of the man.

Smaller than the weight of the man

Greater than the weight of the man

Zero

While passing through the atmosphere total energy is reduced due to.

Choose an answer

scattering

Absorption

Reflection

All of these

In microwave ovens, heating is produced by the phenomena of

Choose an answer

Reflection

Refraction

Damped oscillations

Resonance

The field in which the work done is independent of the path followed.

Choose an answer

Conservative field

Electric field

Magnetic field

Non conservative field

The number of 0.0001 is abbreviated correctly by

Choose an answer

1 x 10⁴

10^-3

10^-4

0.1 x 10⁴

Two simple pendulums of the same length but having different masses

Choose an answer

Have different frequencies

Will have period proportional to their masses

Will have periods independent of their length

Have the same period

Which vector can be used to locate the centre of mass of a collection of particles.

Choose an answer

Null vector

Unit vector

Position vector

Distance vector

The velocity of an object when projected from the earth in order to escape the earth's gravitational field is called the.

Choose an answer

Terminal velocity

Average velocity

Instant aeneous velocity

Escape velocity

The centre of gravity of an object is also called.

Choose an answer

Centre of buoyancy

Centre of mass

Centre of the body

Torque

MT-2 is the dimensionless formula of.

Choose an answer

Moment of iniertia

Viscosity

surface tension

Angular acceleration

Which base units would be needed to express the SI unit of potential difference.

Choose an answer

Kg and A only

m , s and A

kg, m, s and A

mg, m and s

The consumption of energy by a 60 W bulb in 2 s is

Choose an answer

0.02 J

30 J

60 J

120 J

The SI unit of coefficient of viscosity of

Choose an answer

kg m s-1

kg m-1 s-1

kg ms -2

A force of 10 N is acting along z-axis, its component along x -axis and y-axis is

Choose an answer

2 N , 8 N

3 N, 7 N

5 N each

Zero

The dimensions of work are

Choose an answer

[MLT-2]

[ML2T-2]

[ML2T-1]

[MLT-1]

If a body is moving with constant velocity then

Choose an answer

Its acceleration is zero

Its direction may be changing

Its speed may be changing

Its acceleration is constant

More Classes

Other Links

PPSC Physics Chapter 1 MECHANICS MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer