Question # 1

In the absence of air resistance the acceleration of a body will be

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Uniform

Variable

Instantaneous

None of these

The velocity of a free falling body just before Hattin the ground is 9.8 ms-1, the height through which is fall be

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98 m

19.6 m

4.9 m

9.8 m

A force applied on a body produces acceleration in

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Opposite direction

perpendicular direction

Its own direction

In any direction

A ball is thrown up with 20 ms-1 at an angle of 60 ^owith x-axis , the velocity of the ball at the top position is.

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0 ms-1

10 ms-1

20 ms-1

16 ms-1

The mass of a body is quantitative measure of its

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Motion

Inertia

Weight

All of these

The slope of velocity time graph shows

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Total distance covered

Average acceleration

Instantaneous acceleration

Torque

If velocity time graph is parallel to time axis, then acceleration of moving body will be.

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Maximum

Positive

Zero

Negative

For maximum range the angle of projection must be

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30^o

45^o

60^o

90^o

At what speed the momentum and kinetic energy of a body having the same.

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1 ms-1

2 ms-1

4 ms-1

8 ms-1

When the body moves with constant acceleration the velocity time graph is

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Parabola

Hyperbola

Straight line

Curve

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

When the car moves with an increasing acceleration then its velocity time graph is always

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Constant

Variable

A straight line

A curve

A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.

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10 ms-1

12.2 ms-1

15 ms-1

29.4 ms-1

Food rich in proteins is:

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potato

grapes

vegetables

bread

When velocity time graph is a straight line parallel to time axis then

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Velocity is zero

Acceleration is constant

Acceleration is zero

Velocity is variable

A frame of reference stationed at the earth is an

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Inertial frame

None internal frame

Accelerated frame

Laboratory frame

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