MIS

Question 1

A:- A particle covers equal distance in equal time interval in uniform motion along straight line.
R:- Uniform circular motion is always non accelerated motion.

Answer 1

(3)

Circular motion hmeshs accelerated hoti hai, and chahe uniform ho non uniform dono case nay acceleration variable hota hai

Question 2

A:- Sign of acceleration does not tells us that speed of particle is increasing or decreasing.
R:- If speed of particle is increasing then it’s acceleration may be negative

Answer 2

(2)

Acceleration agar positive ya negative hai to spedd badh bhi sakti hai or ghat bhi.

Agar speed badh rhi hai to velocity and acceleration same direaction may honge.
Or agr speed kam ho rhi hai to velocity and acceleration alg direction may honge.

Question 3

A:- Displacement of particle depends on origin you have chosen.
R:- Displacement of a particle doesn’t depend on frame of reference.

Answer 3

(4)

Displacement origin par depend nhi karta Lakin frame of reference par depend karta hai

Question 4

A:- The equation of motion can be applied only if acceleration is along the direction of velocity and constant.
R:- If acceleration of particle is constant then it’s motion is uniform motion.

Answer 4

(4)

Equation ke liye acceleration ka constant hona jaruri hai but direction, velocity se alg ho sakti hai

Uniform motion ke liye acceleration zero hona chahiye or speed constant

Question 5

A:- The position time graph of uniform motion in one dimension can have negative slope.
R:- When speed of body decrease with time then it’s position time graph has constant negative slope.

Answer 5

(3)

A:- slope negative or positive ho skata hai

R:- agar speed decrease ho rhi hai tab, position time graph constant nhi ho sakta

Question 6

If a particle is moving with constant speed then it’s acceleration must be zero.

Answer 6

No, ho sakta tha, agr particle straight line may chalta or velocity ki direction change na hoti but circular path may jab speed constant hoti hai tab bhi velocity ki direction change hoti hai, or acceleration velocity ki vjh se aata hai

Question 7

Rest and motion are relative words

Answer 7

Right, means ho sakta hai koi objects kisi observer ke respect may rest par ho ya vhi object kisi dusre observer ke respect may gatimaan ho

Question 8

A:- If particle is moving with increasing speed in straight line then it’s acceleration may be negative.
R:- Velocity is a vector quantity.

Answer 8

(1)
Both are right + correct explanation

Question 10

A body can have a constant velocity and still have a varying speed.

किसी पिंड का वेग स्थिर हो सकता है और फिर भी उसकी speed परिवर्तित हो सकती है।

Answer 10

No, Esa nhi ho sakta hai

Question 11

The direction of the velocity of a body can change when it’s acceleration is constant.

किसी पिंड के वेग की दिशा तब बदल सकती है जब उसका त्वरण स्थिर हो।

Answer 11

Yes, Esa ho sakta hai