Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 13

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A space craft of mass $M$ is travelling in space with velocity $v$ It then breaks up into two parts such that the smaller part $m$ comes to the rest, then the velocity of the remaining part is

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Important Questions on Laws of Motion

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 14

A bomb ật rest has mass

60 kg

: It explodes and a fragment of

40 kg

has kinetic energy

96

joule. Then kinetic energy of other fragment

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 15

A moving body of mass

m

and velocity

3 km / h r

collides with a body at rest and of mass

2 m

and then sticks to it. Now the combined mass starts to move, then the combined velocity will be :

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 16

A train of mass

M

is moving on a circular track of radius

R

with constant speed

v

. The length of train is half the perimeter of track. The linear momentum of the train will be

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 17

Two bodies of masses

m

and

4 m

are moving with equal linear momentum. The ratio of their kinetic energies is

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 18

Two blocks of masses

m_{1}

and

m_{2}

are connected by a massless spring and placed on smooth surface. The spring initially stretched and released. Then:
(a) the momentum of each particle remains constant separately
(b) the momentums of each body are equal
(c) the magnitude of momentums of each body are equal to each other
(d) the mechanical energy of system remains constant

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 19

A bag of mass

M

hangs by a long thread and a bullet (mass

m

) comes horizontally with velocity

v

and gets caught in the bag. Then for the combined system (bag + bullet)

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Alpha Question Bank for Medical: Physics>Chapter 5 - Laws of Motion>Exercise-1>Q 20

In the figure shown the initial velocity of boat $(30 kg) +$ person $(15 kg)$ is $2 m / s .$ Find velocity of person w.r.t. boat so that velocity of boat will be $1 m / s$ in right (Neglect friction between boat and water)