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What does the acronym IUCN stand for?

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Important Questions on Laws of Motion

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

The correct IUPAC name of the following compound

Question Image
is :

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

A mass

M

attached to a horizontal spring executes

S . H . M .

of amplitude

A_{1}

. When the mass

M

passes through its mean position, then a smaller mass

m

is placed over it and both of them move together with amplitude

A_{2}

. The ratio of

(\frac{A_{1}}{A_{2}})

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

Select the correctly written scientific name of mango, which was first described by Carolus Linnaeus.

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A body of mass

M

moving with velocity

v

explodes into two equal parts. If one part comes to rest and the other part moves with velocity

v_{0}

; what would be the value of

v_{0}

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

Which is the National Aquatic Animal of India?

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

In an elastic collision of two billiard balls, which of the following quantities remain conserved during the short time of collision of the balls (i.e., when they are in contact).

(b) Total linear momentum? Give reason for your answer in each case.

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A truck and a car are moving with same kinetic energy. Both are brought to rest by applying the same retarding force.

S_{1}

is the distance travelled by truck before coming to rest and

S_{2}

is the distance travelled by the car before coming to rest.

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

A bullet of mass $m$ fired at $30 °$ to the horizontal leaves the barrel of the gun with a velocity $v .$ The bullet hits a soft target at a height $h$ above the ground while it is moving downward and emerges out with half the kinetic energy it had before hitting the target. Which of the following statements are correct in respect of bullet after it emerges out of the target?

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

Suppose the average mass of raindrops is

3 \times 10^{- 5} kg

and their average terminal velocity

9 {ms}^{- 1}

. Calculate the energy transferred by rain to each square metre of the surface at a place which receives

100 cm

of rain in a year.

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy

10 keV

, and the second with

100 keV

. Which is faster, the electron or the proton? Obtain the ratio of their speeds. (electron mass

= 9.11 \times 10^{- 31} kg

, proton mass

= 1.67 \times 10^{- 27} kg

1 eV = 1.60 \times 10^{- 19} J

)

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

If a man speeds up by

1 m s^{- 1}

, his KE increase by

44 %

. His original speed in

m s^{- 1}

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

Two bodies

A

and

B

have masses

20 k g a n d 5 kg

respectively. Each one is acted upon by a force of

4 kgf

. If they acquire the same kinetic energy in time

t_{A}

and

t_{B}

respectively. Then the ratio of

\frac{t_{A}}{t_{B}}

is
(Assume

g = 10 m s^{- 2}

)

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

When an ideal gas is compressed adiabatically, temperature rises and the molecules on the average have more kinetic energy than before. The kinetic energy increases

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A light and heavy body have equal kinetic energy. Which has greater momentum?

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Physics>Mechanics>Laws of Motion>Conservation of Momentum

In an elastic collision of two billiard balls, which of the following quantities remain conserved during the short time of collision of the balls (i.e., when they are in contact).

(a) Kinetic energy.

Give reasons for your answer.

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A machine, which is

75 %

efficient, uses

12 J

of energy in lifting up a

1 kg

mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is (in

{ms}^{- 1}

)

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A running man has half the kinetic energy of a boy. Mass of man is double the mass of the boy. The man speeds up by

1.0 m s^{- 1}

and then he has same energy as the boy. The original speeds of the man and boy respectively are

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A bullet fired from a gun with a velocity of

10^{4} m s^{- 1}

goes through a bag full of straw. If the bullet loses half of its kinetic energy in the bag, its velocity when it comes out of the bag will be

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

In a ballistics demonstration a police officer fires a bullet of mass

50 g

with speed

200 {ms}^{- 1}

on soft plywood of thickness

2 cm

. The bullet emerges with only

10 %

of its initial kinetic energy. The emergent speed of the bullet is

EASY

Physics>Mechanics>Laws of Motion>Conservation of Momentum

A body of mass

4 kg

is moving with momentum of

8 kg m s^{- 1}

. A force of

0.2 N

acts on it in the direction of motion of the body for

10 s

. The increase in kinetic energy is

What does the acronym IUCN stand for?

Important Questions on Laws of Motion

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