1. The strong physical interaction among bodies involving exchange of momentum is called collision.
2. The time of duration of collision is very short
3. In the collision process, bodies need not get intophysical contact.
4. If the colliding bodies move along a straight line joining their centers of mass before and after the collision; it is called head on collision or collision in one dimension.
5. When the bodies move in a plane either before or after the collision is called collision in two
dimensions.
6. When no external force acts, the momentum of the system remains constant, this is called
conservation of momentum ;
7. A bullet of mass ‘m’ is fired from a gun of mass
‘m’ with a velocity ‘v’, the recoil velocity of the gun is (V)
::::::;?!!!!!!!!??????????!!?
(Give answer)
8. Two bodies of masses M1 and M2 are moving inthe same direction with velocities u1 ,u2
; After collision they move in the same direction with velocities V1 and V2
Then m1u1+m2u2=m1v1+m2v2
9. If the two bodies stick together after impact, they move with common velocity
...!!!!!!!??????????????
(Give answer)
10. A truck of mass ‘M’ moves with a velocity ‘v’; A
packet of mass ‘m’ is gently dropped into it, the
velocity of the truck becomes
??!!??????????????????
(Give answer)
11. A shell of mass ‘M’ at rest explodes and breaks
into two pieces ; one piece of mass ‘m’ moves
with a velocity ‘v’. The other piece moves in the opposite direction, with a velocity ;
-----????????!!!???!?????!
(Give answer)
12. A shell of mass ‘m’ moving with a velocity ‘v’ explodes and breaks into ‘2’ pieces ; one piece
of mass m1 moves with a velocity v1 and other piece of mass m2
moves with a velocity v2
?!!!!!????????????????
(Write momentum EQ)
13. Two bodies each of mass ‘m’ moving at right angleswith a velocity ‘v’ collide ; After collision, if they move together, their common velocity is....
No comments:
Post a Comment