Question

(A)assertion: spread of aids can be prevented by using disposable syringes
reason: aids spread through contaminated syringes



(B) assertion: velocity is directly proportional to displacement
reason: displacement is the distance covered in a given direction

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Answer 1

Answer:

1) A and R both are correct and R is the coorect explanation of A

2) A and R both are correct but R is not corrcet explanation of A

Answer 2

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Answer:

a) both assertion and reason are correct but reason is not correct explanation for reason

b) both assertion and reason are correct and reason is correct explanation for assertion

explanation:

a) here it's given about the the AIDS can be prevented by using disposable syringes and the reason it can be spread through contaminated syringes is also correct part that do not explain about the prevention of AIDS by disposal syringes

b) Let x(t) be the distance covered and v(t) be the speed at any time t.

x(t)=kt^2

where k is some positive constant as distance covered is always positive.

v(t)= dx/dt

v(t)=2kt

Now, t>0. Hence, v(t) is always positive.

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