Tamil Nadu (English Medium) Std 8 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
'Friction can never be entirely eliminated'. This statement is :

(A) False	(B) True
(C) Sometimes true	(D) Sometimes false

Question-2
Gravitational force is :

(A) Repulsive force	(B) Attractive force
(C) both 1 and 2	(D) niether repulsive nor attractive

Question-3
A liquid's force is acting over an area of 4m². If the pressure is 25 N/m². What is the force?

(A) 25 N	(B) 6.2 N
(C) 100N	(D) 6 N

Question-4
Choose the correct one from the following.

(A) Friction is less when the surface is hard.	(B) Friction increases with increase in mass.
(C) Friction with increase in mass.	(D) All of these

Question-5
Wheels and ball bearings are used to :

(A) Decrease friction	(B) Decrease force
(C) Increase force	(D) Increase friction

Question-6
From the following which one is used to reduce friction?

(A) Water	(B) Sand
(C) Grease	(D) Gravel

Question-7
A force changes :

(A) The speed of an object	(B) The direction of motion of object
(C) either (1) or (2)	(D) neither (1) or (2)

Question-8
The force exerted by a charged body on another charged or uncharged body is known as :

(A) Electric force	(B) Electric field
(C) Electric potential	(D) Electrostatic force

Question-9
Which of the following is not a non-contact force?

(A) Frictional force	(B) Gravitational force
(C) Electrostatic force	(D) Magnetic force

Question-10
When we hit a cricket ball with a cricket bat ,what will happen ?

(A) Its directions of motion changes and speed remains same	(B) Its direction of motion and speed changes
(C) Its direction of motion donot change	(D) Its speed remains the same

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Std 8

Tamil Nadu (English Medium)

Practice in Related Chapters
Measurements
Force and Pressure
Electricity and Heat
Light and Sound