What is true about the kinematics of a particle? A ) The velocity of a particle is always positive , B ) The velocity of a particle is equal to the slope of the position-time graph , C ) If the position of a particle is zero , then the velocity must zero , D ) If the velocity of a particle is zero , then its acceleration must be zero ,

1 )  What is true about the kinematics of a particle?

A )  The velocity of a particle is always positive ,

B )  The velocity of a particle is equal to the slope of the position-time graph ,

C )   If the position of a particle is zero , then the velocity must zero ,

D )  If the velocity of a particle is zero ,  then its acceleration must be zero ,

Correct Answer : -   B )  The velocity of a particle is equal to the slope of the position-time graph ,

 

2 )  Can you think of a physical example of when force is a function of position?

A )  a spring ,

B )  drag ,

Correct Answer : -   A )  a spring ,

 

3 )  Can you think of a physical example of when force is a function of velocity ?

A )   a spring ,

B )   drag ,

Correct Answer : -     B )   drag ,

 

4 )  If you fire a projectile from 150 meters above the ground .   What launch angle will give you the greatest horizontal distance x ?

A )   A launch angle of 45 ,

B )   A launch angle less than 45 ,

C  )   A launch angle greater than 45 ,

D )   It depends on the launch velocity ,

Correct Answer : -     B )   A launch angle less than 45 ,

 

5 )  What would happen if , for a given tangential velocity and acceleration , the arm radius was doubled ?

A )  The accelerations would remain the same ,

B )   The an would increase and the at would decrease ,

C )   The an and at would both increase ,

D )  The an would decrease and the at would increase ,

Correct Answer : -    D )  The an would decrease and the at would increase ,

 

6 )  For a particle in uniform rectilinear motion ……………..

A )    a=0 v=0  ,

B )    a=constant v=constant ,

C )    a=0 v=constant ,

D )    a=constant v=0  ,

Correct Answer : -    C )    a=0 v=constant ,

 

7 )   For a particle in uniform accelerated motion ……………….

A )   a=constant ,

B )   v=constant ,

Correct Answer : -   A )   a=constant ,

 

8 )   Study of the geometry of motion .   Relates displacement , velocity , acceleration , and time without reference to the cause of motion .

A )  Kinetics ,

B )  Kinematics ,

Correct Answer : -    B )  Kinematics ,

 

9 )  Study of the relations existing between the forces acting on a body and the motion of the body .

A )  Kinetics ,

B )  Kinematics ,

Correct Answer : -    A )  Kinetics ,

 

10 )  The motion of projectile could be replaced by  …………………..

A )   two independent rectilinear motions .

B )   two dependent rectilinear motions .

C )    two independent curvilinear motions .

D )   two dependent curvilinear motions .

Correct Answer : -    A )   two independent rectilinear motions .