1 ) According to the spherical relative theory , as the speed of object increases , so mass will . . . . . . . . . . . . . : - A ) increase , B ) decrease , C ) remain same , D ) None of these ,

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 : -

UG Online quizzes