Physics MCQs

Page No. 72

Slope of velocity time graph is_____________________?


a acceleration


bdistance


cforce


dmomentum


View Answer acceleration

When velocity time graph is a straight line parallel to time axis then__________________?


aacceleration is const


b acceleration is variable


cacceleration is zero


dvelocity is zero


View Answer acceleration is zero

A body is moving with uniform velocity. Its______________________?


aspeed changes


bacceleration changes


c direction of motion changes


ddisplacement from origin changes



Why Ballistic missile fails in some circumstances of precision ?


adue to their shape


bdue to air resistance


cdue to angle of projection


dall of these


View Answer due to air resistance

Time rate of change of momentum is equal to____________________?


aforce


bimpulse


cvelocity


dboth A and C


View Answer force

At which angle the range of the projectile is maximum____________________?


a 45


b60


c30


dnone


View Answer 45

Flight of a rocket in the space is an example of______________________?


asecond law of motion


bthird law of motion


cfirst law of motion


dlaw of gravitation


View Answer third law of motion

Distance covered by a freely falling body in 2 seconds will be__________________?


a4.9 m


b19.6 m


c39.2 m


d44.1 m


View Answer 19.6 m

What is the angle of projection for which the range and maximum height become equal ?


atan-1 ¼


btan-1 4


ctan-1 ½


d tan-1 2


View Answer tan-1 4

Taking off rocket can be explained by __________________?


a1st law of motion


b2nd law of motion


c Law of conservation of momentum


dlaw of conservation of energy



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