Saturday, September 13, 2014

flipped notes 3 force and motion

Class: 9   Month: June                                       Flipped Notes Number: 09/Sci/09/03

Subject: Science                                                  Chapter: 09 – force and laws of motion


Name: ____________________________________________


1.              Fill in the blanks:

a    Newton observed this phenomenon with every ___________ applied to any body, and realized that forces are always in ___________________. He termed them as

________________ and _______________________.


b    According to Newton’s third law, every ___________________ has its ____________

and _________________________reaction.

c    According to law of conservation of _______________________, when two or more

_____________ act upon one another, their total _____________________ remains

______________________ or _____________________  provided no _________________

are acting

2.              Match the columns for the following case:

A truck of mass m1 and a car of mass m2 are moving in the same direction with velocities u1 and u2 respectively. Let truck collides with the car for a short time t. After this short collision, let the velocity of truck become v1 and that of the car is v2.

Column I

Column II
Total momentum of

F1 = m2 x (v2 – u2)







truck, car system



t
before collision









Total momentum of

F2 = m1 x (v1 – u1)
truck, car system


t



after collision









Force F1 exerted by

m1v1 + m2v2
the truck on the car









force F2 exerted by

m1u1 + m2u2
the car on the truck














1


Class: 9   Month: June
Flipped Notes Number: 09/Sci/09/03
Subject: Science
Chapter: 09 – force and laws of motion





































































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