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9th Class Physics 1st Quarter Book Paper9th Class · Physics · Punjab (PTB)
Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)
Which of the following is a contact force?
A girl walks 3 km towards west and 4 km towards south. What is the magnitude of her total distance and displacement respectively?
Least count of micrometer screw gauge:
Sir Isaac Newton was born in Lincolnshire on:
If an object is moving with constant speed than its distance time graph will be a straight line:
The least count of digital Vernier Callipers is:
According to the law of conservation of momentum.
By dividing displacement of a moving body with time, we obtain:
This standard of measurement is called:
Famous book of Sir Isaac Newton is:
A body has translatory motion if it moves along a:
0.2 mm in units of meters is:
Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)
Solve the following:
Define momentum. Write its unit.
What does the gradient of a distance-time graph represent?
Define systematic error?
Inflatable air bags are installed in the vehicles as safety equipment. In terms of momentum, what is the advantage of air bags over seat belts?
Define kinematics.
Differentiate between physical and non-physical quantities?
Write an advantage of electronic balance over mechanical balance.
Speed of a car is 72kmh-1 Convert this speed in ms-1.
Which SI unit will you use to express the height of your desk?
What is elastic force? Give its examples.
Is it possible for a body to have acceleration? When moving with: (i) Constant velocity (ii) Constant speed.
Q3. Long questions (Attempt any 3 of 4 · 3 × 4 = 12)
(i)Define acceleration. Write its formula and Sl unit.(ii) Explain average acceleration.(iii) Define uniform and non-uniform acceleration.
State the similarities and differences between Vernier Callipers and micrometer screw gauge.
Explain the term rolling friction briefly.
Define graph. Explain graphical analysis of motion.