Two bees A & B were hovering in the garden near two flowers. There positions with respect to origin are given for bee A(1,2,3) m and for bee B (3. 2. 1)m. Att=0. they start moving towards each other with equal speeds and meet at a 1 point P. If they meet at P after s. their speed must be :- 2 (A) √2m/s (B) 2 m/s (C) 2√2m/s (D) 4 m/s
Answers
Answer❣
A rational number is a fractional number which is in the form of a p/q , where q is ≠ 0.
Some examples are 2/5,3/6,7/8 , 2/3, 2/9 and so on.
Here , see the denominator 5,6,8,9 &3 all are >0
=>Rational number can be further converted into decimal form e.g., 1/2= 0.5
Learn more:
Types
Real Numbers ( real numbers includes all the integers )
Natural Numbers
Whole Numbers
Standard form of Rational Number:
Rational number having fractional values with no common factor between dividend and divisor and Divisor be positive.
e.g., 12/36= 2/6= 1/3
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Given : Two bees A & B were hovering in the garden near two flowers. There positions with respect to origin are given for bee A(1, 2, 3) m and for bee B (3, 2, 1)m.
At t=0. they start moving towards each other with equal speeds and meet at a point P after 1/√2 s.
To Find : their speed must be :-
(A) √2m/s (B) 2 m/s (C) 2√2m/s (D) 4 m/s
Solution:
A(1, 2, 3)
B (3, 2, 1)
Distance between points = √(3 - 1)² + (2 - 2)² + ( 1 - 3)²
= √4 + 0 + 4
= √8
= 2√2 m
They move towards each other with equal speeds
Hence Distance covered by Each is Equal and half of total distance
= 2√2 /2
= √2 m
Time Taken = 1/√2 s.
Speed = Distance/time
= √2 / (1/√2)
= 2 m/s
Correct option is B) 2 m/s
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