Microscopic group of Physics dealt with the study of ____________.

(a)

classical physics

(b)

statistical mechanics

(c)

fluid mechanics

(d)

quantum physics

The speed of a train is reduced from 60 kmh^-1 to 15 kmh^-1 in a distance of 450 m. If the retardation is uniform is the distance, it will travel further before coming to rest is _______________.

(a)

25m

(b)

30m

(c)

15m

(d)

20m

When a projectile is at its maximum height, the direction of its velocity and acceleration are _____________.

(a)

parallel to each other

(b)

perpendicular to each other

(c)

anti-parallel to each other

(d)

depends on its speed

A marble block of mass 3 kg lying on ice when given a velocity of 5 ms^-1 is stopped by friction in 10s. Then the coefficient of friction is ______________.

(a)

0.01

(b)

0.05

(c)

0.03

(d)

0.06

A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 ms^-1. The final velocity acquired by the person and the average force exerted on the person are ________________.

(a)

-0.08 ms^-1, 16N

(b)

-0.8 ms^-1, 8 N

(c)

-1.6 ms^-1, 16N

(d)

-1.6 ms^-1 , 8 N

The angle between the normal force and the resultant force of normal force and maximum frictional force is _____________.

(a)

angle of friction

(b)

angle of repose

(c)

angle of inclination

(d)

none of the above

An escalator is moving downwards with a uniform speed 5 ms^-1. A man of mass 60 kg is running upwards on it at a uniform speed 10 ms^-1. If the height of the escalator is 10 m, the work done by the man is going up the escalator is ____________. (Take g = 10 ms^-2).

(a)

12J

(b)

12kJ

(c)

1.2kJ

(d)

120kJ

When a mass is rotating in a plane about a fixed point its angular momentum is directed along ______________.

(a)

A line perpendicular to the plane of rotation

(b)

 The radius

(c)

 The tangent to the circle

(d)

An angle of 45° to the plane of rotation

In a rectangle ABCD (BC = 2AB). The moment of inertia is minimum along axis through _____________
 

(a)

BC

(b)

BD

(c)

HF

(d)

EG

A particle is kept at rest at a distance R (earth's radius) above the earth's surface, the minimum speed with which it should projected so that it does not return is ____________.

(a)

\(\sqrt { \frac { GM }{ 4R } } \)

(b)

\(\sqrt { \frac { GM }{ 2R } } \)

(c)

\(\sqrt { \frac { GM }{ R } } \)

(d)

\(\sqrt { \frac { 2GM }{ R } } \)