# 8 - Vector and 3 D Questions Answers

A parallelopiped is formed by planes drawn through the points (1,2,3) and (9,8,5) parallel to the coordinate planes then which of the following is not the length of an edge of this rectangular parallelopiped.

A) 2 B) 4 C) 6 D) 8

**Asked By: VAIBHAV GUPTA**5 year ago

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Let a,b,c be non coplanar unit vectors , equally inclined to one another at an angle θ. If a x b+b x c = p**a**+q**b**+r**c. **Find scalars p q r in terms of θ

**Asked By: VAIBHAV GUPTA**5 year ago

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Find the manitude vector of A and B are i+j+3j-7k are 5i-2j+4k

**Asked By: JAFARI KHATIB TULLI**6 year ago

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1. the distance covered by a body in each second exceeds the distance covered by it in the previous second by a. If it covers a distance a/2 in first second from start, total distance covered in first t seconds of the motion is

sir please explain me the formula you will use to solve this!!!

2. Two forces (p+q) and (p-q) make an angle 2β with one another and their resultant makes an angle α with the bisector of the angle between them. Then the value of p ⁄ q is

Sir the answer is 2tanβ ⁄ tanα.

**Asked By: HEMA RANI**6 year ago

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find the distance of the point (1,-2,3) from the plane x-y+z=5 along the line x/2=y/3=z/-6 ?

**Asked By: DINESH SHARMA**6 year ago

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Is area always a vector quantity or it can be a vector quantity?

**Asked By: AMIT DAS**6 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

generally it is scalar but in the measurement of flux through a surface it is considered a vector perpendicular to the surface with same magnitude

line AB intersects CD internally in the ratio K : 1 where K is undefined , these line may be ( 1) concurrent , (2) intersecting , (3) skew < (4) all of these . explain plese ?

**Asked By: SHUBHAM VED**6 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

I think it will be skew because skew lines do not intersect in real points

show that line perpendicular to x-axis and a line perpendecular to y-axis having slope multipication -1

**Asked By: HARISH**7 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

Angle between two lines is given by the formula

tanθ = (m_{1}-m_{2})/(1+m_{1}m_{2})

solve this by taking θ = 90