What is the value of one light year in tera metre?

(a)

9.46 \(\times\) 10⁶Tm

(b)

9.46 \(\times\)10⁹Tm

(c)

9.46 \(\times\) 10²Tm

(d)

9.46 \(\times\) 10³Tm

Distance is a scalar quantity and ______________ is a vector.

(a)

Speed

(b)

Length

(c)

Time

(d)

Displacement

The position vector of a particle is \(\vec r=4t^2\hat i+2t\hat j+3\hat k\) . The speed of the particle at t = 5s is ____________.

(a)

42 ms^-1

(b)

3 s

(c)

3 ms^-1

(d)

40 ms^-1

When a horse pulls a wagon, the force that causes the horse to move forward is the force?

(a)

the ground exerts on him

(b)

the exerts on the ground

(c)

the wagon exerts on him

(d)

the exerts on the wagon

A body of mass 3 kg hits a wall at an angle of 60° and returns at the same angle. The impact time was 0.2 sec. The force exerted on the wall

(a)

150\(\sqrt { 3 } \) N

A block of mass 2 kg is placed on the floor. The co efficient of static friction is 0.4. The force of friction between the block and floor is ______________.

(a)

2.8 N

(b)

7.8 N

(c)

2 N

(d)

zero

A suitcase is dragged 30 m along a floor by a force of 10 N inclined at an angle 30° to the floor. The work done on the suitcase is ________________.

(a)

\(150\sqrt 2J\)

(b)

150J

(c)

\(150\sqrt 3J\)

(d)

\(\sqrt 3J\)

If a solid sphere and solid cylinder of same mass and radius rotate about their own axis the M.I. will be greater for _______________.

(a)

Solid sphere

(b)

Solid cylinder

(c)

Both (a) and (b) 

(d)

Equal both

A fly wheel rotating about fixed axis has a kinetic energy of 360 joule when its angular speed is 30 radian/sec, The moment of inertia of the wheel about the ax is of rotation is _____________.

(a)

0.6 kgm²

(b)

0.15 kgm²

(c)

0.8 kgm²

(d)

0.75 kgm²

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