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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