The angle between A i +j and B = i - j is ______________.

(a)

45°

(b)

90°

(c)

-45°

(d)

180°

Consider the quantities pressure, power, energy, impulse, charge. Out of these, the only vector quantity is _______________.

(a)

pressure

(b)

power

(c)

impulse

(d)

charge

The length of a vector is _______________

(a)

always a negative quantity

(b)

always a positive quantity

(c)

either positive or negative

(d)

denoted by '\(\lambda \)' 

Distance is a scalar quantity and ______________ is a vector.

(a)

Speed

(b)

Length

(c)

Time

(d)

Displacement

Choose the motion in two dimension from the following.

(a)

Motion of a train along a straight railway track

(b)

An object falling freely under gravity close to the Earth.

(c)

A particle moving along a curved path in a plane.

(d)

Flying of a kite on a windy day.

A body is allowed to fall from a height of 100 m. If the time taken for the first 50m is t₁, and for the remaining 50m is t₂, then ________________

(a)

t₁ = t₂

(b)

t₁ > t₂

(c)

t₁ < t₂

(d)

depends upon the mass

The velocity of a particle at an instant t is 10 m/s. After 5 s the velocity is 20 m/s. The velocity, 3 seconds earlier was ______________

(a)

2 m/s

(b)

3 m/s

(c)

4 m/s

(d)

5 m/s

The acceleration of a moving body can be found from _____________

(a)

area under velocity-time graph

(b)

area under distance-time graph

(c)

slope of the velocity-time graph

(d)

slope of distance-time graph

The slope of the velocity-time graph for retarded motion is ______________

(a)

positive

(b)

negative

(c)

zero

(d)

can be positive, negative or zero

A man wants to hit the target, he should point its rifle ______________

(a)

higher than target

(b)

lower than target

(c)

in the same direction

(d)

nothing can be said

The time of flight is __________ the time taken to attain the maximum height:

(a)

thrice

(b)

same

(c)

twice

(d)

four times

The angle of projection for a projectile to cover maximum range is _______________

(a)

30°

(b)

60°

(c)

0°

(d)

45°

Which of the following is true regarding projectile motion?

(a)

horizontal velocity of projectile is constant

(b)

vertical velocity of projectile is constant

(c)

acceleration is not constant

(d)

momentum is constant

The study of motion, without consideration of its cause is studied in______________.

(a)

statistics

(b)

kinematics

(c)

mechanics

(d)

modern physics

Two vectors act along the mutually perpendicular directions are called______vectors.

(a)

equal

(b)

opposite

(c)

orthogonal

(d)

orthogonal unit

If \(\bar A\) and \(\bar B\) denotes the sides of a parallelogram whose area is \(\frac{1}{1}\left| A \right|\left| B \right|\) the angle between \(\bar A\) and \(\bar B\) is _______________

(a)

60°

(b)

45°

(c)

30°

(d)

90°

The angular speed of a fly-wheel making 120 revolutions/minute is ______________.

(a)

\(\pi\) rad/sec

(b)

\(4\pi\) rad/sec

(c)

\(2\pi\) rad/sec

(d)

\(4\pi^2\) rad/sec

A body is moving with a constant speed v in a circle of radius r. Its angular acceleration is _____________.

(a)

vr

(b)

\(\frac{v}{r}\)

(c)

zero

(d)

\(\frac{v}{r^2}\)

What is the angle between \(\hat i+\hat j+\hat k\) and \(\hat j\)?

(a)

0°

(b)

45^o

(c)

60°

(d)

none of these

Position-time graph for motion with negative acceleration is ____________.

(a)

(b)

(c)

(d)

An aeroplane is flying with a uniform, speed of 150 kmhr^-1 along the circumference of a circle. The change in its velocity in half the revolution (in kmhr^-1)is

(a)

150

(b)

200

(c)

100

(d)

300

A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 m S^-2, the velocity with which it hits the ground is ______________.

(a)

10.0m/s

(b)

20.0m/s

(c)

40.0m/s

(d)

5.0m/s

The radius of the earth was measured by _____________.

(a)

Newton

(b)

Eratosthenes

(c)

Galileo

(d)

Ptolemy

Unit vector is _______________.

(a)

having magnitude one but no direction

(b)

\(A\vec A\)

(c)

\(\frac{\hat A}{A}\)

(d)

|A|

\(\hat i\times \hat i\) is _____________

(a)

0

(b)

1

(c)

\(\infty\)

(d)

\(\hat j\)

An object is dropped from rest. Its v - t graph is ______________.

(a)

(b)

(c)

(d)

Which of the following graph represents the equation y = mx - C?

(a)

(b)

(c)

(d)

Which of the following graph represents the equation y = kx²?

(a)

(b)

(c)

(d)

For a particle, revolving in a circle with speed, the acceleration of the particle is ______________.

(a)

along the tangent

(b)

along the radius

(c)

along its circumference

(d)

zero

The angle for which maximum height and horizontal range are same for a projectile is ______________.

(a)

32^o

(b)

48^o

(c)

76^o

(d)

84^o