Question # 1

Earth is considered to be

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a non-inertial frame

an inertial frame

an accelerated frame

none of the above

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

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Increases

Decreases

Remains same

None of these

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s²)

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58.8 m/s

49 m/s

65 m/s

19.6 m/s

The expression F x t is called impulse if the time 't' is

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zero

very large

very small

infinite

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

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The ball had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

The displacement coincides with the path of the motion when a body moves is a

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curved line

straight line

may be curved or straight

none of them

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

If the objects of different masses move with the same velocity, then it is more difficult to stop the

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lighter of the two

massive of the two

any one of them

both of them

Tick the conservation force:

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Tension in a string

Air resistance string

Elastic spring force

Frictional force

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

The vertical component of velocity of a projectile during its motion is minimum

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at the time of projection

at the highest point

just before hitting the plane of projection

all of them

The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

The decrease in velocity per unit time is called:

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Variable Acceleration

Average Acceleration

Retardation

None of these

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