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SAI INTERNATIONAL SCHOOL

CLASS-IX PHYSICS HOME ASSIGNMENT-6

OBJECTIVE

MCQ’S:

Q1) When a balloon held between the hands is pressed, its shape changes. This
happens because:
(a) Balanced forces act on the balloon
(b) Unbalanced forces act on the balloon
(c) Frictional forces act on the balloon
(d) Gravitational force acts on the balloon

Q3) What is not true of unbalanced forces?
a. It can change the velocity of the object
b. It can change the direction
c. Change the momentum
d. Change the shape of the body

FILL IN THE BLANKS:
1. Force has both ____________ and _______________.
2. Force is a ______________ quantity.
3. In balanced force the resultant force is ________________.

EASY QUESTIONS:

Q1) Define force? Explain push and pull force giving examples in each case?

Q2) Explain the effects of force giving examples in each case?

Q4) Write two differences between balanced and unbalanced forces?

Q5) In the following example, try to identify the number of times the velocity of ball
changes:

A football player kicks a football to another player of his team who kicks the football
towards the goal. The goalkeeper of the opposite team collects the football and kicks it
towards a player of his own team.

BOARD QUESTIONS:

Q1) Record the observations for the following daily-life applications:

SL Description of Action: ( Pushing, pulling, kicking, picking, Action can be
NO the situation hitting, lifting, throwing, shutting, flicking, grouped as