Question # 1

The SI unit of angular velocity is.

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cm s-1

rad s-2

cm s-2

rad s-1

A negative acceleration does not necessaryimply.

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Decreasing speed

An increasing distance

An increasing speed

A decreasing distance

The working of the rocket is based on the principle of.

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Electromagnetism

Conservation of momentum

Floatation

Hydraulic system

A field in which the work done in moving a body along the closed path is zero.

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electric field

electromagnetic field

Conservative field

Non conservative field

Angular moment is conserved due to

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Variable force

Constant force

Central force

Uniform force

when a bowl of water is take into the bottom of a well the work done is.

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Positive

Negative

Zero

Maximum

A body attached to a spring is pulled to a distance of 20 cm If the value of spring constant is 48 N m-1, the amount of force applied will be.

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4.8 N

9.6 N

96 N

192 N

In planetary motion

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Angular speed remains constant

Angular momentum remains constant

Linear speed remains constant

Linear momentum remains constant

Simple harmonic motion is a type of

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rectilinear motion

Circular motion

Rotational motion

Zig Zag motion

The path of a projectile is a

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Straight line

Circle

Ellipse

Parabola

A spring of force constant k is out into three equal pats. The force constant of earth part will b e.

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k

3 k

k/3

k/2

The rate of change of angular momentum of a body is equal to.

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Applied force

Moment of inertial

Applied torque

Impulsive force

Supplementary units radian and steradian were established for

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Density

Viscosity

electric intensity

Geometrical quantities

A car is travelling with uniform acceleration the road has check posts every 100 m When the car passes one post , it has a speed of 10 m s-1 and when passes the next one its speed is 20 ms-1 What is the cars acceleration.

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0.67 m s-2

1.5 m s2

2.5 m s-2

6.0 m s-2

Work has the same dimensions as that of

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Power

Liner momentum

Angular momentum

Torque

The resultant of two force 3 N and 4 N making an angle 90 ^o with each other is.

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1 N

3 N

5 N

10 N

The unit formed by combining the fundamental untis of length , mass and time.

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Absolute units

Practical units

Bse unit

Derived units

If a force of 10 N makes an angle of 30 ^o with x-axis its component is given by

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1.866 N

8.66 N

0.89 N

0.866 N

Impulse is equal to.

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F x t/2

\F x t /4

F x t

F x t /m

An object at the end of a spring oscillates with SHM of angular frequency 2 rad s-1 What is the period of oscillation.

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0.32 s

0.50 s

0.80 s

3.1 s

Which of the following is renewable source of energy.

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Oil

Natural gas

Uranium

Sunlight

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