Hot and important MCQs for chapter 5-Exploring Forces in class VIII subject Science
Enhance knowledge with MCQs:
- What is the push or pull on an object known as?
a) Work
b) Energy
c) Force
d) Pressure
Answer: ✅ Force - What is the SI unit of force?
a) Joule
b) Watt
c) Newton
d) Pascal
Answer: ✅ Newton - What kind of force do we apply when we lift or push an object using our body muscles?
a) Magnetic
b) Gravitational
c) Muscular
d) Electrostatic
Answer: ✅ Muscular - What effect can the application of force have on an object?
a) Only change its shape
b) Only stop motion
c) Change speed, direction or shape
d) Create motion only
Answer: ✅ Change speed, direction or shape - What type of force requires direct contact between two objects?
a) Magnetic
b) Contact
c) Gravitational
d) Electrostatic
Answer: ✅ Contact - What is the force called that opposes motion between two surfaces in contact?
a) Frictional
b) Muscular
c) Buoyant
d) Magnetic
Answer: ✅ Frictional - What determines the amount of friction between two surfaces?
a) Temperature of surfaces
b) Nature of the surfaces
c) Colour of the surfaces
d) Weight only
Answer: ✅ Nature of the surfaces
. What kind of force acts even when objects are not touching each other?
a) Muscular
b) Non-contact
c) Frictional
d) Contact
Answer: ✅ Non-contact
- What happens to a rolling ball when friction suddenly disappears?
a) It stops immediately
b) It reverses direction
c) It keeps moving endlessly
d) It melts
Answer: ✅ It keeps moving endlessly - What type of force allows a magnet to attract a nail without touching it?
a) Magnetic
b) Frictional
c) Gravitational
d) Buoyant
Answer: ✅ Magnetic
More Questions:
- What happens when two like magnetic poles are brought close to each other?
a) They attract
b) They repel
c) They lose magnetism
d) They merge
Answer: ✅ They repel - What kind of force pulls all objects towards the centre of the Earth?
a) Frictional
b) Gravitational
c) Magnetic
d) Buoyant
Answer: ✅ Gravitational - What kind of force is always attractive in nature?
a) Gravitational
b) Electrostatic
c) Magnetic
d) Frictional
Answer: ✅ Gravitational - What happens to the weight of an object on the Moon compared to its weight on Earth?
a) It doubles
b) It remains same
c) It becomes one-sixth
d) It becomes zero
Answer: ✅ It becomes one-sixth - What upward force does a liquid apply on an object immersed in it?
a) Magnetic
b) Buoyant
c) Gravitational
d) Frictional
Answer: ✅ Buoyant - What condition allows an object to float on water?
a) Its weight is more than upthrust
b) Upthrust is zero
c) Upthrust equals its weight
d) No force acts
Answer: ✅ Upthrust equals its weight - Which principle explains why some objects float while others sink?
a) Newton’s Law
b) Archimedes’ Principle
c) Hooke’s Law
d) Pascal’s Law
Answer: ✅ Archimedes’ Principle - What device is used to measure the weight of an object in newtons?
a) Thermometer
b) Spring balance
c) Beam balance
d) Barometer
Answer: ✅ Spring balance - What quantity does the spring balance measure when an object is hung from its hook?
a) Energy
b) Volume
c) Weight
d) Pressure
Answer: ✅ Weight - On which type of surface will friction be the greatest?
a) Polished glass
b) Rough sandpaper
c) Wooden table
d) Ceramic tile
Answer: ✅ Rough sandpaper
True or False:
Friction helps us to walk. — True
Magnetic force needs direct contact between objects. — False
Weight of an object is the same everywhere. — False
Similar electric charges attract each other. — False
A spring balance measures the gravitational pull on an object. — True
Fill in the Blanks:
- The SI unit of force is _______.
(a) Pascal
(b) Joule
✅(c) Newton
(d) Watt
- The force that opposes motion between two surfaces is _______.
(a) Magnetic
✅(b) Frictional
(c) Electrostatic
(d) Gravitational
- The force that makes objects fall towards Earth is _______.
✅(a) Gravitational
(b) Muscular
(c) Frictional
(d) Magnetic
- The upward force exerted by water on floating objects is called _______.
(a) Pressure
✅(b) Buoyant force
(c) Friction
(d) Weight
- The two types of forces are _______ and _______.
✅(a) Contact, Non-contact
(b) Static, Dynamic
(c) Linear, Circular
(d) Push, Pull
Assertion–Reason Questions:
Options:
a) Both A and R true and R explains A
b) Both true but R not explanation
c) A true R false
d) A false R true)
1. Assertion (A): Friction always acts opposite to motion.
Reason (R): Friction helps objects move easily.
→ ✅(c) A is true but R is false.
2. Assertion (A): The weight of an object can change from place to place.
Reason (R): Gravitational force differs at different locations.
→ ✅(a) Both A and R true and R explains A.
3. Assertion (A): A magnet can attract a piece of iron without touching it.
Reason (R): Magnetic force is a non-contact force.
→ ✅(a) Both A and R true and R explains A.
To Learn more Click Below:
MCQs:
Chapter 1- Exploring the Investigative World of Science – CLICK HERE
Chapter 2- The Invisible Living World: Beyond Our Naked Eye – CLICK HERE
Chapter 3- Health: The Ultimate Treasure – CLICK HERE
Chapter 4-Electricity: Magnetic and Heating Effects – CLICK HERE