WBJEE 2021 Math Solved Paper

CATEGORY - I (Q:1 to Q50)

Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.

Question : 4 of 75

Marks: +1, -0

Two particles A and B move from rest along a straight line with constant accelerations f and f′ respectively. If A takes m‌sec. more than that of B and describes n units more than that of B in acquiring the same velocity, then

(f+f′)m2=ff′n
(f−ff′)m2=ff′n
(f′−f)n=
1
2
ff′m2
1
2
(f+f′)m=ff′n2

Validate

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A:	u=0	a1=f	t1=t+m	s=n+s
B:	u=0	a2=f′	t2=t	s=s