Question # 1

Swimming is based on the principle of

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Newton's 1st law

Newton's 2nd law

Newton's 3rd law

All

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

Biomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

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

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

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Velocity

Weight

Force

Both B and C

Blomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass. By what velocity the gun rebounds backwards?

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0.1 m/s

10 m/s

1 m/s

0.01 m/s

The short distance between two points direction from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

During the upward motion of the projectile, the vertical component of velocity:

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Decreases

Increases

Remains constant

None of these

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:

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10 NS

100 NS

140 NS

200 NS

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

A ball of mass m moving with uniform speed collides elastically with another stationary ball. The incident ball will lose maximum kinetic energy when mass of the stationary ball is

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m

2 m

4 m

Infinity

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

If the acceleration of a body is negative, then slope of the velocity-time graph will be:

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Zero

Positive

Negative

Infinity

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