Related Questions

Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation
A Is directly proportional to their velocity of approach
B Is inversely proportional to their velocity of approach
C Bears a constant ratio to their velocity of approach
D Is equal to the sum of their velocities of approach
Go and catch the falling star. Here the ‘‘falling’’ is
A an adverb
B a preposition
C an adjective
D a verb
In the case of bodies falling under gravity which of the following remains constant at a given place?
A Kinetic energy
B Potential energy
C acceleration
D all the above
A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?
A 18
B 38
C 48 
D 28
During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.
A Equal to
B Equal and opposite to
C Less than
D Greater than
The phenomenon of collision of two elastic bodies takes place because bodies
A Immediately after collision come momentarily to rest
B Tend to compress each other till they are compressed maximum possible
C Attempt to regain its original shape due to their elasticities
D All the above
For the Stoke's law to be valid in the case of a falling sphere in a fluid, the
A [

A. Reynolds number (based on sphere diameter) should be

B. Flow around the sphere should be in turbulent region

B Sphere must be metallic
C Fluid density should be constant
In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.
A Directly proportional to
B Inversely proportional to
C Inversely proportional to the square root of
D Independent of
In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.
A Inverse
B Square root
C Second power
D First power
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the
A Inverse of fluid viscosity
B Square of particle size
C Difference in the densities of the particle & fluid
D All of the above

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