1 ) According to the spherical relative theory , as the speed of object increases , so mass will . . . . . . . . . . . . . : -
Choose
single option from these following : -
A ) increase , B
) decrease ,
C ) remain same , D ) None of these ,
Correct
Answer : - A ) increase ,
2 )
Derivative of velocity with respect to time is known as . . . . . . . . . . . .
. . . : -
Choose
single option from these following : -
A ) displacement , B
) variable velocity ,
C ) acceleration ,
D ) None of these ,
Correct
Answer : - C ) acceleration ,
Acceleration
is derivative of velocity with respect to time ,
a =
dv / dt .
3 )
In projectile motion , a body will have . . . . . . . . . . . . . . ,
Choose
single option from these following : -
A ) constant horizontal velocity and constant vertical
acceleration ,
B ) variable horizontal velocity and constant vertical
acceleration ,
C ) constant horizontal velocity and variable vertical
acceleration ,
D ) variable horizontal velocity and variable vertical
acceleration ,
Correct
Answer : - A ) constant horizontal
velocity and constant vertical acceleration ,
Explanation
: -
In projectile motion , a body moves forward due to
inertia and in downward direction due to gravity . There is no force along horizontal
direction because acceleration is zero towards x – axis . A force acting on a
body is force of gravity , ay = g .
So body will move constant horizontal velocity and
constant vertical acceleration .
Now go to online quiz section and Physics Quiz 12 is uploaded related to these mcqs , so check your preparation by this link : -
