Physics For Class IX (Science) - Solved Model Paper 2023- By BSEK - Solved By Sir Wasim Ahmad

Go To Index
Class IX (Science)
Physics Solved Model paper 2023

Solved By Sir Wasim Ahmad

SOLVED MODEL PAPER
SECTION "B" (40%)
SHORT ANSWER QUESTIONS (24 Marks)

Note: Answer any eight (8) questions from this section. Each carries 3 marks.
Q.2: Define significant figure. Determine the number of significant figure in:
(i) 1.33 (ii) 0.0012 (iii) 7.00 (iv) 0.00101
Ans: Significant figure:
The members of reliably known digits in a value are known as significant figure.

Value	Significant Figure
1.33	3
0.0012	2
7.00	3
0.00101	3

Q.3: Write down three difference between Speed and Velocity.
Ans: Difference Between Speed And Velocity:

	Speed	Velocity
Definition	Distance covered by an object in a unit time is called speed.	Rate of change of displacement with respect to time is called velocity.
Formula	v = S/t	ν = Δd/t
Nature	It is a scalar quantity	It is a vector quantity
Unit	The SI unit is meter per second (m/s)	The SI unit is meter per second (m/s)

Q.4: State Newton's second law of motion. Show the relationship between applied force and the acceleration produced in the body.
Ans: Second Law Of Motion:
Definition:
When a force acts on a body it produces  acceleration in the direction of force. The acceleration is directly proportional to force and inversely proportion to mass of body.
Mathematically:
If "F" is a force applied on a body of mass "m" which produces an acceleration "a" is the body then