Distinguish between : (A) Real and pseudo forces, (B) Conservative and non-conservative forces,

Monjur Alahi

Distinguish between : 

(A) Real and pseudo forces, 

(B) Conservative and non-conservative forces, 

(C) Contact and non-contact forces, 

(D) Inertial and non-inertial frames of reference.


0 like 0 dislike
10 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

(A) Real and pseudo forces,

No Real force Pseudo Force
i A force which is produced due to interaction between the objects is called real force. A pseudo force is one which arises due to the acceleration of the observer’s frame of reference.
ii Real forces obey Newton’s laws of motion. Pseudo forces do not obey Newton’s laws of motion.
iii Real forces are one of the four fundamental forces. Pseudo forces are not among any of the four fundamental forces.
Example: The earth revolves around the sun in circular path due to gravitational force of attraction between the sun and the earth. Example: Bus is moving with an acceleration (a) on a straight road in forward direction, a person of mass ‘m’ experiences a backward pseudo force of magnitude ‘ma’.

(B) Conservative and non-conservative forces,

No Conservative Non-conservative forces
i If work done by or against a force is independent’ of the actual path, the force is said to be a conservative force. If work done by or against a force is dependent of the actual path, the force is said to be a non-conservative force.
ii During work done by a conservative force, the mechanical energy is conserved. During work done by a non‐ conservative force, the mechanical energy may not be conserved.
iii Work done is completely recoverable. Work done is not recoverable.
Example: gravitational force, magnetic force etc. Example: Frictional force, air drag etc.

(C) Contact and non-contact forces,

No Contact forces Non-contact forces
i The forces experienced by a body due to physical contact are called contact forces. The forces experienced by a body without any physical contact are called non-contact forces.
ii Example: gravitational force, electrostatic force, magnetostatic force etc. Example: Frictional force, force exerted due to collision, normal reaction etc.

(D) Inertial and non-inertial frames of reference.

No. Inertial frame of reference Non-inertial frame of reference
i The body moves with a constant velocity (can be zero). The body moves with variable velocity.
ii Newton’s laws are Newton’s laws are
iii The body does not accelerate. The body undergoes acceleration.
iv In this frame, force acting on a body is a real force. The acceleration of the frame gives rise to a pseudo force.
Example: A rocket in inter-galactic space (gravity free space between galaxies) with all its engine shut. Example: If a car just starts its motion from rest, then during the time of acceleration the car will be in a non- inertial frame of reference.
0 like 0 dislike
10 views
Talk Doctor Online in Bissoy App
Resultant of two forces when angle between them is `60^(@)` is 6 Newton and if angle between forces increased to `120^(@)` then resultant becomes `sqr

Correct Answer - C `F_(1)^(2)+F_(2)^(2)+F_(1)F_(2)=36` `F_(1)^(2)+F_(2)^(2)-F_(1)F_(2)=14` `F=sqrt(F_(1)^(2)+F_(2)^(2))=sqrt(50)=5sqrt(2)`

2 Answers 1 views
For `a`, `b`,`c` non-zero, real distinct, the equation, `(a^(2)+b^(2))x^(2)-2b(a+c)x+b^(2)+c^(2)=0` has non-zero real roots. One of these roots is als

Correct Answer - C `(c )` ` (a^(2)+b^(2))x^(2)-2b(a+c)x+b^(2)+c^(2)=0` `D=4b^(2)(a+c)^(2)-4(a^(2)+b^(2))(b^(2)+c^(2))` `=-4(b^(4)-2b^(2)ac+a^(2)c^(2))` `=-(n^(2)-ac)^(2)` For real roots, `D ge 0` `implies -4(b^(2)-ac)^(2) ge 0` `implies b^(2)-ac=0` `implies` Roots are real and equal. `:.` Roots...

2 Answers 1 views
Distinguish between: Legal Tender Money and Non-Legal tender Money.

Legal Tender Money Non-Legal Tender Money (i) Legal Tender Money is the money that is backed by law and refusal to accept will be punishable by law. (i) Non-legal tender money is the...

2 Answers 1 views
The resultant of two forces of 3 N and 4 N is 5 N, the angle between the forces is

Correct option is: (C) 90°

2 Answers 1 views
Which of the following is the empty/non-empty set `(i) {x:x"is a real number and"x^(2)-1=0}` `{x : x"is a real number and" x^(2)+1=0}` `(iii) {x : x "

Correct Answer - `(i)` non empty `(ii)` empty `(iii)` non-empty `(iv)` non-empty

2 Answers 1 views
Explain the work-energy theorem in case of an accelerating conservative force along with a retarding non-conservative force.

1. Consider an object dropped from some point at height h. 2. While coming down its potential energy decreases. ∴ Work done = decrease in P.E of the body. 3. But, in this...

2 Answers 2 views
Distinguish between ohmic and non ohmic substances; explain with the help of example.

Ohmic substances Non-ohmic substances 1. Substances which obey ohm’s law are called ohmic substances. Substances which do not obey ohm’s law are called nonohmic substances. 2. Potential difference (V) versus current (I) curve is...

2 Answers 2 views
Out of the following forces, which force is non-conservative? 

Correct option is: (C) frictional Friction forces are non-conservative force because its depend on the path.

2 Answers 1 views
Out of the following forces, which force is non-conservative?  2 Answers 1 views
Pseudo force is true only in  (A) frame of reference which is at rest  (B) inertial frame of reference. 

Correct option is: (D) non-inertial frame of reference

2 Answers 1 views
X