The term used to mention study of macroscopic system to microscopic constituents is _____________.

(a)

unification

(b)

macrocosm

(c)

reductionism

(d)

microcosm

Kinematics deals with the motion of objects without taking____________into accounts.

(a)

mass

(b)

force

(c)

velocity

(d)

all the above

Spinning of the earth about its own axis is known as _______________.

(a)

linear motion

(b)

circular motion

(c)

curvilinear motion

(d)

rotational motion

A body of mass M moving with velocity V explodes into two equal parts. If one comes to rest and the other body moves with velocity v, what is the value of v?

(a)

V

(b)

\(V/\sqrt { 2 } \)

(c)

4V

(d)

2V

A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0  m/s^-2. If g = 10 ms^-2, the tension in the supporting cable is _____________.

(a)

8600 N

(b)

9680 N

(c)

11000 N

(d)

1200 N

In an elastic collision ___________ is conserved

(a)

kinetic energy

(b)

momentum

(c)

both (a) and (b)

(d)

neither (a) nor (b)

A mass of 1 kg is thrown up with a velocity of 1.00 m/s. After 5 seconds, it explodes into two parts. One part of mass 400 g comes down with a velocity 25 m/s. The velocity of other part is (Take g = 10 ms^-2)

(a)

40 m/s

(b)

40 m/s

(c)

100 m/s

(d)

60 m/s

A particle of mass m is circulating on a circle of radius r having angular momentum L then the centripetal force will be _______________.

(a)

L² /mr

(b)

L²m/ r

(c)

L² / mr³

(d)

L² / mr²

Consider a system of two particles having masses m₁ and m₂ If the particle of mass m₁ is pushed towards the mass centre of particles through a distance d, by what distance would be particle of mass m₂ move so all to keep the mass centre of particles at the original position?

(a)

\(\frac { m_{ 1 } }{ { m }_{ 1 }+{ m }_{ 2 } } \)d

(b)

\(\frac { { m }_{ 1 } }{ { m }_{ 2 } } \)d

(c)

d

(d)

\(\frac { { m }_{ 2 } }{ { m }_{ 1 } } \)d

Rotational Kinetic energy of a body is ____________.

(a)

\(\frac { 1 }{ 2 } \)mr²

(b)

\(\frac { 1 }{ 2 } \)Iω²

(c)

\(\frac { 1 }{ 2 } \)Iv²

(d)

\(\frac { 1 }{ 2 } \)mω²