Question # 1

A cold soft drink is kept on the balance. When the cap is opened, then the weight

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Increases

Decreases

First increases, then decreases

Remains same

The motion in a plane is the motion in

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one dimension

two dimension

three dimension

four dimension

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?

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4.2 m

8.4

12.6

None of these

Unit of impulse in

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Newton

Kg m

Kg m/s

Joule

Acceleration in a body is always produced in the directin of:

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Velocity

Weight

Force

Botha B and C

The velocity of a projectile is maximum

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at the point of projection

just before striking the ground

at none of them

at both of them

The motion of a projectile is

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one dimension

two dimension

three dimension

all of them

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

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0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

A man sitting in a bus travelling in a direction from west to east with a speed of 40 km/h observes that the rain drops are falling vertically down. To the another man standing on ground the rain will appear

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To fall vertically down

To fall at an angle going from west to east

To fall at an angle going from east to west

The information given is insufficient to decide the direction of rain

Rate of change of momentum is called

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Impulse

Force

Torque

Momentum

A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?

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Both hit the ground at the same veloctiy

Both hit the ground at the same speed

The change of velocity during the path for both balls is the same

The change of speed during the path for both balls is the same

When two protons are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

A body whose momentum is constant must have constant

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Acceleration

Velocity

Force

None of these

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

Laws of motion are not valid in a system which is

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inertial

non-interial

at rest

moving with uniform velocity

The magnitude of the displacement is a line from initial position to final position which is

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straight

curved

either be curved or straight

none of them

Change in momentum is one second called.

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Impulse

Force

Energy

Work

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

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the body rotates

the body speeds up

the mass of the body decreases

the body changes its direction

Root out the conventional source of energy:

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Energy from blomass

hydroelectric energy

Geothermal energy

None of these

When a body is moving on a surface, the force of friction is called

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Static friction

Dynamic friction

Limiting friction

Rolling friction

The path (or trajectory) described by a projectile is

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a parabola

a hyperbola

a circle

a straight line

In the expression F x t, the force F is

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total force

instantaneous force

average force

all of them

The consumption source if energy is:

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Energy from blomass

Hydroelectric energy

Geothermal energy

None of these

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

Suppose the water flows out from a pipe at 3kg s^-1and its velocity changes from 5m s^-1to zero on striking the wall, then the force exerted by water on wall will be

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5 N

10 N

15 N

20 N

A non-inertial frame of reference is that frame of reference in which

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a = 0

a > 0 or a < 0

v = 0

none of them

A rocket carries its own fuel in the form of

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liquid only

liquid or solid

liquid and solid

liquid or solid and oxygen

If the velocity time graph is a straight line parallel to the time-axis, then it means:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of these

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