8th Standard Science
Physics | UNIT-2 Force and Pressure
July Month Assignment Answers
8th Science, Physics UNIT-2 Force and Pressure July Month Assignment , 8th Science July Month assignment, TN 8th Standard Science UNIT-2 Force and Pressure, UNIT- 10 Changes around us and UNIT- 17 Plant Kingdom July Month Assignment Download PDF. 8th Assignment 2 Unit2 July Month Assignment.
ASSIGNMENT
Class: 8 Subject: Science(Physics)
UNIT-2 Force and Pressure
Part A
I. One Mark Questions.
1. Atmospheric pressure -------------with altitude from the surface of the earth.
a) Increases
b) decreases
c) first decreases then increases
d) does not change
2. Pascal's law is used in
a) hydraulic lift
b) brake system
c) pressing heavy bundles
d) all the above
3. Why more number of wheels are set on heavy vehicles?
a) to increase the pressure
b) to increase the area of contact on the road
c) to increase the speed
d) to control the speed
4. The SI unit of atmospheric pressure is ----------
a) Newton/metre2
b) Newton/metre
c) Newton
d) Joule
5. The factor that determines whether a substance floats or sinks in a liquid
a) upward force
b) downward force
c) gravitational force
d) frictional force
Part B
II. Short Answer.
1. State Pascal’s law.
2. Camels can walk easily on the sand. Why?
3. Water spider insect slides on the water surface easily. Give reason.
Part C
III. Answer in detail.
1. a) What is friction? Write their types.
b)Write advantages and disadvantages of friction.
