Question # 1

If the rate of change of momentum w.r.t Time is zero then

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Momentum is a function of time

Momentums is not conserves

Momentum is constant

The impulse is into he same direction as the momentum

A body of mass 2 kg attached to a spring is pulled to a distance of 4 cm What will be the value of spring constant K.

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490 N m-1

980 N m-1

1260 N m-1

1960- N m-1

In simple harmonic motion it is found that the total energy of a system.

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Is independent of the amplitude

Depends on the amplitude squared

Is independent of the mass

All of these

An astronaut in an earth satellite will observe the sky as

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Light blue

Deep blue

White

Black

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height.

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4.9 m

19.9 m

29.4 m

49.2 m

The total energy of body executing SHM is directly proportional to.

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Amplitude

Square of amplitude

Square root of amplitude

Reciprocal of amplitude

If slope of velocity time graph gradually decreases, then a body is said to have

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Negative acceleration

Positive acceleration

Uniform velocity

Variable velocity

The spin angular momentum and orbital angular momentum are usually differentiated in terms of.

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Radius of bodies

Mass of bodies

Torques of bodies

Momentum of bodes

The centre of gravity of a body is

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The centre of the body

The point at the mass of the body acts

The point at which the whole weight of the body acts

The point of rotation

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

Which of the following quantities is zero about the centre of mass of body.

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Mass

acceleration

Moment

Angular acceleration

The horizontal range is equal for the angles.

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30 ^o and 45 ^o

30 ^oand 60 ^o

45 ^o and 90 ^o

60 ^oand 75 ^o

If the presence of air friction, the path of a projectile appears as.

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Straight line

Parabola

Hyperbola

zig zag

If a planet of mass double than that of the earth and radius three times greater than the earth a 10 kg mass on its surface will weight.

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2.2 N

4.4 N

6.7 N

13.2 N

In rotational motion the quantity which plays the same role as the inertial mass in rectilinear motion.

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Angular momentum

Linear momentum

Moment of inertia

Torque

The equal and opposite forces acting on a body form

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Angular momentum

Linear momentum

Torque

Couple

The angle subtended at the centre of a circle by an arc equal to its radius is equal to.

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One rotation

One radian

One degree

One revolution

For maximum range angle of projection of the projectile should be

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45 ^o

90^o

120 ^o

180 ^o

The source of geothermal energy is

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The fusion in the sun

the radioactive decay in the earths interior

the rotation of earth around the sun

The rotation of earth around its own axis

The gravitational strength on the surface of moon is 1.6 N kg-1 What will be the mass and weight of an object respectively on the surface of the moon.

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10 kg , 1.6 N

10 Kg , 16 N

16 Kg, 10 N

16 kg, 160 N

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