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All questions of Force for Class 6 Exam
What unit is commonly used to measure force in the International System of Units (SI)?- a) Pound
- b) Gram-force
- c) Newton
- d) Dyne
Correct answer is option 'C'. Can you explain this answer?
What unit is commonly used to measure force in the International System of Units (SI)?
a)
Pound
b)
Gram-force
c)
Newton
d)
Dyne
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Headway Institute answered |
The SI unit of force is the Newton (N). Named after Sir Isaac Newton, this unit quantifies the amount of force needed to accelerate a one-kilogram mass by one meter per second squared.
What is the effect of gravitational force?- a) It has no effect on motion.
- b) It pushes objects away from each other.
- c) It pulls objects toward each other.
- d) It increases the mass of objects.
Correct answer is option 'C'. Can you explain this answer?
What is the effect of gravitational force?
a)
It has no effect on motion.
b)
It pushes objects away from each other.
c)
It pulls objects toward each other.
d)
It increases the mass of objects.
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Headway Institute answered |
Gravitational force is the attractive force that pulls objects toward each other. For example, Earth’s gravitational force pulls objects toward its center, causing them to fall if dropped.
Which of the following methods can be used to increase friction?- a) Polishing surfaces
- b) Making surfaces rougher
- c) Streamlining shapes
- d) Using lubricants
Correct answer is option 'B'. Can you explain this answer?
Which of the following methods can be used to increase friction?
a)
Polishing surfaces
b)
Making surfaces rougher
c)
Streamlining shapes
d)
Using lubricants
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Headway Institute answered |
Increasing the roughness of surfaces enhances the interlocking between them, thereby increasing friction. This is commonly seen in sports footwear with textured soles that improve grip on various surfaces.
Which factor does NOT affect the frictional force between two surfaces?- a)The area of contact.
- b)The texture of the surfaces.
- c)The speed of movement.
- d)The weight of the object.
Correct answer is option 'A'. Can you explain this answer?
Which factor does NOT affect the frictional force between two surfaces?
a)
The area of contact.
b)
The texture of the surfaces.
c)
The speed of movement.
d)
The weight of the object.
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Headway Institute answered |
The area of contact does not significantly affect the magnitude of friction for most practical purposes. Friction primarily depends on the nature of the surfaces and the weight of the object pressing them together.
What is the main characteristic of balanced forces?- a) They change an object's direction.
- b) They increase an object's speed.
- c) They cause motion.
- d) They cancel each other out.
Correct answer is option 'D'. Can you explain this answer?
What is the main characteristic of balanced forces?
a)
They change an object's direction.
b)
They increase an object's speed.
c)
They cause motion.
d)
They cancel each other out.
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Headway Institute answered |
Balanced forces occur when two forces acting on an object are equal in size but opposite in direction, resulting in no change in the object's state of motion. This means the object remains at rest or continues to move at a constant velocity.
What happens to the mass of an object when a force is applied to it?- a) It becomes variable.
- b) It decreases.
- c) It increases.
- d) It remains the same.
Correct answer is option 'D'. Can you explain this answer?
What happens to the mass of an object when a force is applied to it?
a)
It becomes variable.
b)
It decreases.
c)
It increases.
d)
It remains the same.
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Headway Institute answered |
The mass of an object remains unchanged when a force is applied. This is because force does not alter the material composition of the object; it only affects its state of motion or rest.
Which type of force is NOT a contact force?- a) Tension
- b) Normal force
- c) Friction
- d) Magnetic force
Correct answer is option 'D'. Can you explain this answer?
Which type of force is NOT a contact force?
a)
Tension
b)
Normal force
c)
Friction
d)
Magnetic force
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Headway Institute answered |
Magnetic force is a non-contact force that can act at a distance without physical interaction between the magnet and the object. Unlike contact forces such as friction, normal force, and tension, magnetic force does not require direct contact.
In which scenario would static friction be at its maximum?- a) When an object is in free fall.
- b) When an object is at rest and a force is applied.
- c) When an object is rolling.
- d) When an object is sliding down a slope.
Correct answer is option 'B'. Can you explain this answer?
In which scenario would static friction be at its maximum?
a)
When an object is in free fall.
b)
When an object is at rest and a force is applied.
c)
When an object is rolling.
d)
When an object is sliding down a slope.
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Headway Institute answered |
Static friction reaches its maximum when an external force is applied to an object that is at rest but not enough to overcome that friction. Once the applied force exceeds static friction, the object begins to move, transitioning to kinetic friction.
What type of friction is experienced when rolling a ball on the ground?- a) Sliding friction
- b) Kinetic friction
- c) Rolling friction
- d) Static friction
Correct answer is option 'C'. Can you explain this answer?
What type of friction is experienced when rolling a ball on the ground?
a)
Sliding friction
b)
Kinetic friction
c)
Rolling friction
d)
Static friction
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Headway Institute answered |
Rolling friction occurs when an object rolls over a surface, such as a ball rolling on the ground. This type of friction is generally less than sliding friction, which makes rolling easier than sliding.
Which of the following is NOT a type of contact force?- a) Friction
- b) Gravitational force
- c) Normal force
- d) Tension
Correct answer is option 'B'. Can you explain this answer?
Which of the following is NOT a type of contact force?
a)
Friction
b)
Gravitational force
c)
Normal force
d)
Tension
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Headway Institute answered |
Gravitational force is a non-contact force that acts at a distance without physical contact between objects. In contrast, friction, tension, and normal force require direct contact between the interacting objects.
How does a heavier object affect friction compared to a lighter object?- a) It has no effect on friction.
- b) It makes friction variable.
- c) It increases friction.
- d) It reduces friction.
Correct answer is option 'C'. Can you explain this answer?
How does a heavier object affect friction compared to a lighter object?
a)
It has no effect on friction.
b)
It makes friction variable.
c)
It increases friction.
d)
It reduces friction.
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Headway Institute answered |
A heavier object increases the normal force acting between two surfaces, thereby increasing friction. This is why it requires more effort to move heavier objects than lighter ones.
When you rub your hands together, what effect does friction have?- a) It creates heat.
- b) It cools your hands.
- c) It increases the size of your hands.
- d) It changes the color of your hands.
Correct answer is option 'A'. Can you explain this answer?
When you rub your hands together, what effect does friction have?
a)
It creates heat.
b)
It cools your hands.
c)
It increases the size of your hands.
d)
It changes the color of your hands.
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Headway Institute answered |
Rubbing hands together generates heat due to friction. This heat can warm your hands, which is particularly useful in cold weather. Friction converts kinetic energy from the rubbing motion into thermal energy.
What happens to the speed of a moving object when a force is applied in the direction opposite to its motion?- a) The speed decreases.
- b) The speed increases.
- c) The object's direction changes.
- d) The object stops moving.
Correct answer is option 'A'. Can you explain this answer?
What happens to the speed of a moving object when a force is applied in the direction opposite to its motion?
a)
The speed decreases.
b)
The speed increases.
c)
The object's direction changes.
d)
The object stops moving.
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Headway Institute answered |
When a force is applied opposite to the direction of motion, it reduces the object's speed. This principle is utilized in braking systems of vehicles, where brakes exert a force opposite to the motion of the vehicle to slow it down.
What is the main purpose of lubricants in mechanical systems?- a) To change the material properties.
- b) To increase speed.
- c) To increase friction.
- d) To reduce wear and tear.
Correct answer is option 'D'. Can you explain this answer?
What is the main purpose of lubricants in mechanical systems?
a)
To change the material properties.
b)
To increase speed.
c)
To increase friction.
d)
To reduce wear and tear.
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Headway Institute answered |
Lubricants are used in mechanical systems to reduce friction between moving parts. By creating a barrier between surfaces, lubricants help minimize wear and tear, enhance efficiency, and prolong the lifespan of machinery.
Which force is responsible for slowing down or stopping the motion of objects?- a) Friction
- b) Tension
- c) Applied force
- d) Gravitational force
Correct answer is option 'A'. Can you explain this answer?
Which force is responsible for slowing down or stopping the motion of objects?
a)
Friction
b)
Tension
c)
Applied force
d)
Gravitational force
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Headway Institute answered |
Friction is the force that opposes the relative motion between two surfaces in contact. It acts in the opposite direction to the movement of the object, thereby slowing it down or bringing it to a stop.
What is the primary effect of friction between a vehicle's tires and the road?- a) It causes the tires to wear out immediately.
- b) It decreases the speed of the vehicle instantly.
- c) It helps the vehicle accelerate and stop safely.
- d) It increases fuel efficiency.
Correct answer is option 'C'. Can you explain this answer?
What is the primary effect of friction between a vehicle's tires and the road?
a)
It causes the tires to wear out immediately.
b)
It decreases the speed of the vehicle instantly.
c)
It helps the vehicle accelerate and stop safely.
d)
It increases fuel efficiency.
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Headway Institute answered |
Friction between the tires and the road is essential for providing the necessary grip that allows the vehicle to accelerate, turn, and stop safely. Without sufficient friction, vehicles would skid and lose control, especially in adverse conditions.
What is the role of a spring balance?- a) To measure temperature.
- b) To measure force.
- c) To measure speed.
- d) To measure mass.
Correct answer is option 'B'. Can you explain this answer?
What is the role of a spring balance?
a)
To measure temperature.
b)
To measure force.
c)
To measure speed.
d)
To measure mass.
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|
Headway Institute answered |
A spring balance is a device used to measure force, typically in units of newtons. It operates on Hooke's law, where the force applied to the spring is proportional to the distance it stretches.
What happens to the frictional force when surfaces are made smoother?- a) It increases.
- b) It decreases.
- c) It stays the same.
- d) It becomes variable.
Correct answer is option 'B'. Can you explain this answer?
What happens to the frictional force when surfaces are made smoother?
a)
It increases.
b)
It decreases.
c)
It stays the same.
d)
It becomes variable.
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Headway Institute answered |
Smoother surfaces reduce the amount of interlocking between the surfaces, leading to a decrease in frictional force. This is why polished surfaces allow objects to slide more easily compared to rough surfaces.
Which type of friction occurs when an object slides over a surface?- a) Air resistance
- b) Rolling friction
- c) Static friction
- d) Kinetic friction
Correct answer is option 'D'. Can you explain this answer?
Which type of friction occurs when an object slides over a surface?
a)
Air resistance
b)
Rolling friction
c)
Static friction
d)
Kinetic friction
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Headway Institute answered |
Kinetic friction occurs when two surfaces slide against each other. It generally acts on moving objects and is typically less than static friction, which must be overcome to initiate movement.
What is the primary effect of a force applied to an object at rest?- a) It starts the object moving.
- b) It decreases the object's mass.
- c) It changes the object's color.
- d) It makes the object float.
Correct answer is option 'A'. Can you explain this answer?
What is the primary effect of a force applied to an object at rest?
a)
It starts the object moving.
b)
It decreases the object's mass.
c)
It changes the object's color.
d)
It makes the object float.
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|
Headway Institute answered |
When a force is applied to an object at rest, it can overcome the inertia of the object, causing it to move. This principle is fundamental in understanding how forces initiate motion in everyday situations, such as pushing a chair or kicking a ball.
Chapter doubts & questions for Force - Physics Class 6 ICSE 2025 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Physics Class 6 ICSE
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