physics 1st year past paper lahore board 2016

Academy  For  Excellence  Chung

 

                   Test –physics                                                     total  no # 20

1.   The horizontal range of a projectile is the same for the angles     

     (a) 60⁰ and 80⁰                        (b) 40⁰ and 70⁰       

(c) 45⁰ and 55⁰                               (d) 40⁰ and 50⁰

2.   A ball of mass m moving with uniform speed collides elastically with another stationary ball. The incident ball will lose maximum kinetic energy if mass of the stationary ball is

          (a) m                                                 (b) 2 m

          (c) 4 m                                              (d) Infinite 

3.   A coin is tossed vertically upward with a velocity of 19.6 m/s. Approximately how high will it rise?

          (a) 15 m               (b) 20 m             (c) 25 m                  (d) 30 m

4.   Forces in nature always occur in       

     (a) single form                         (b) pair form 

(c) triple form                           (d) any form

5.   A body moving with velocity v has energy E. Its momentum is

     (a)                              (b)                   (c)                   (d) 

SHORT QUESTIONS

1.       Describe Inertia.

2.       At what angle the range of the projectile is Maximum? Verify your answer.

3.       What is an isolated system? Explain it with an example.

4.       What is ballistic Missile and Ballistic Trajectory?

5.       Describe Time of the projectile.

LONG QUESTIONS

a)      Write a note on Projectile motion.

b)      A ball is thrown horizontally from a height of 10 m with velocity of 21 ms^-1 . How far off it hit the ground and with what velocity?