Which of the following is not a vector

1. Force
2. Weight
3. Mass
4. Momentum
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Answer: C
Explanation:
• N/A
17 1 Complains

Length of null vector is ……..

1. 1
2. 0
3. Arbitrary
4. None of these
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Answer: B
Explanation:
• N/A
11 0 Complains

Position vector `vec(QP)` of P(2,3) and Q(1,2) is …………

1. [1,1]

2. [-1,-1]

3. [-1,1]

4. [1,-1]

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Answer: A
Explanation:
• N/A
5 0 Complains

Position vector `vec(PQ)` of P(2,3) and Q(1,2) is …………

1. [1,1]

2. [-1,-1]

3. [-1,1]

4. [1,-1]

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Answer: B
Explanation:
• N/A
7 0 Complains

If `alpha`, `beta` and `gamma` are direction cosine of vector `vecv=4hati-3hatj` then cos`gamma` is

1. `4/5`
2. `-4/5`
3. `-3/5`
4. 0
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Answer: D
Explanation:
• N/A
13 0 Complains

If `alpha`, `beta` and `gamma` are direction cosine of vector `vecv=4hati-3hatj` then cos`alpha` is

1. `4/5`
2. `-4/5`
3. `-3/5`
4. 0
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Answer: A
Explanation:
• N/A
6 0 Complains

If `alpha`, `beta` and `gamma` are direction cosine of vector `vecv=4hati-3hatj` then cos`beta` is

1. `4/5`
2. `-4/5`
3. `-3/5`
4. 0
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Answer: C
Explanation:
• N/A
5 0 Complains

If `veca=hati-3hatj+4hatk` and `vecb=ahati+9hatj-12hatk` are parallel then `a=` …………

1. 3
2. -3
3. 2
4. -2
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Answer: B
Explanation:
• N/A
4 0 Complains

If `veca=2hati+alphahatj+5hatk` and `vecb=3hati+hatj+alphahatk` are perpendicular then `alpha=`

1. -1
2. 0
3. 1
4. 2
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Answer: A
Explanation:
• N/A
5 0 Complains

If `veca=hati-3hatj+4hatk` projection along `hati` is …

1. -1
2. 0
3. 1
4. 2
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Answer: C
Explanation:
• N/A
5 0 Complains