Explain about force and it’s type

Explain about force and it’s type

Definition of Force:-

It is an external source which may produce or tends to produce, destroy or tends to destroy the motion of body while acting on a body. SI unit of of force is Newton and the CGS unit of force is dyne. [1N= 10⁵ dyne].

Symbol	F or f
Units	Newton, dyne
Formula	F=ma
Dimensional Formula	M1L1T-2

Type of forces

Basically four Fundamental forces are exist in nature. These are:-

1. Gravitational force
2. Electromagnetic force
3. Strong force
4. Weak force

1. Gravitational force:-

it is the force of mutual attraction between any two object by virtue of masses. All objects on the earth experience the force of gravity due to the earth. For example- motion of the moon and satellite around the earth, planets around the sun, evolution of stars and galaxies etc.

2. Electromagnetic force:-

It is the force between charged particles. Attractive for unlike charges and repulsive for like charges. It is enormously strong compared to gravity. The electric force between two protons is 1036 times the gravitational force between them. Gravity is always attractive, while electromagnetic force can be attractive or repulsive.

3. Strong Nuclear force:-

It binds protons and neutrons in nucleus. It is the strongest of all fundamental forces. It is responsible for the stability of nuclei.

4. Weak Nuclear force:-

It is not as weak as the gravitational force, but much weaker than the strong nuclear and electromagnetic forces. It appears only in certain nuclear processes as the beta decay of a nucleus.

Here are 10 daily use examples of force:

1. Pushing a door to open it.
2. Pressing the keys on a keyboard or smartphone screen.
3. Pulling a drawer to access its contents.
4. Walking or running involves applying force to move forward.
5. Using a wrench to tighten or loosen a bolt.
6. Squeezing toothpaste out of a tube.
7. Turning the steering wheel of a car to change direction.
8. Lifting a book or a bag.
9. Using a can opener to open a can.
10. Bouncing a ball on the ground involves applying force to it.

Frequently Asked Questions:

 

1. Weight of an object on the surface of the moon is ?

A) 1/6 that on the surface of the earth
B) 1/5 that on the surface of the earth
C) 1/2 that on the surface of the earth
D) 1/3 that on the surface of the earth

ANSWER= (A) 1/6 that on the surface of the earth
Explain:-
Check Answer

 

2. The SI unit of Force is ?

A) Dyne
B) Newton
C) Watt
D) Kilogram

ANSWER= (B) Newton
Explain:-
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3. One kg of force is equal to

A) 8.9N
B) 7.9N
C) 9.8N
D) 18.9N

ANSWER= (C) 9.8N
Explain:-
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4. A force that opposes the motion of one surface sliding over another is called

A) Friction
B) ball bearing
C) Newton
D) None of these

ANSWER= (A) Friction
Explain:-
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5. The force of gravity acting on an object is also known as____ .

A) Weight
B) Mass
C) Impulse
D) Acceleration

ANSWER= (A) Weight
Explain:-
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6. In science, a pull or a push on an object is called______ .

A) Pressure
B) Force
C) Friction
D) Gravitation

ANSWER= (B) Force
Explain:-
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7. One Newton is equal to______ dyne. ?

A) 10^5
B) 10^6
C) 10^3
D) 10^2

ANSWER= (A) 10^5 dyne
Explain:-
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8. Force is equal to

A) Product of force & acceleration
B) Product of mass and velocity
C) Product of mass and distance
D) Product of mass & acceleration

ANSWER= (D) Product of mass & acceleration
Explain:-
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9. Torque is the force applied to

A) Parallel distance
B) Laminar sheet
C) a and b
D) Perpendicular distance

ANSWER= (D) Perpendicular distance
Explain:-
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10. [MLT−2] is the dimensional formula for

A) Force
B) Velocity
C) Pressure
D) Speed

ANSWER= (A) Force
Explain:-
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Read Also-

• Fundamental quantities and its units
• Force, its types and its units
• Motion and it’s type
• Surface Tension and it’s applications
• Explanations of elasticity and Hooke’s law
• Heat transfer and Modes of heat transfer

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