Which direction will you face if you start facing North and take two right turns anticlockwise?
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Consider a particle of mass \( m \) having linear momentum \( P \) at position \( r \) relative to the origin \( O \). Which of the following equations correctly relates \( r , P , L \) ? a) \( \left[\left(\frac{d L}{d t}\right)+r x\left(\frac{d P}{d t}\right)\right]=0 \) b) \( \left[\left(\frac{d L}{d t}\right)-r x\left(\frac{d P}{d t}\right)\right]=0 \) c) \( \left[\left(\frac{d L}{d t}\right) \times\left(\frac{d r}{d t}\right) \times P\right]=0 \) d) \( \left[\left(\frac{d L}{d t}\right)-\left(\frac{d r}{d t}\right) \times P\right]=0 \)
Correct answer is (b) We know that \(\tau\) = r × F ∵ \(\tau\) \(= \frac{dL}{dt},\) \(F = \frac{dP}{dt}\) \(\left(\frac{dL}{dt}\right) = r \times \left(\frac{dP}{dt}\right)\) \(\left(\frac{dL}{dt}\right) - r \times \left(\frac{dP}{dt}\right) = 0\)
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If the speed of an object decreases, the direction of velocity and acceleration are in …………….. direction.
Correct option is A) same
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Mr. Pawan Kumar, the CEO of an E-Commerce start up, which was facing the problem of huge employee turnover,
Non monetary incentives: 1. Job enrichment: It is concerned with designing jobs that include greater variety of work content, require higher level of knowledge and skill, etc,. 2. Employee recognition programmes: Recognition...
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i. Which direction would a compass needlepoint to, if located right on the geomagnetic north or south pole?
i. At the poles, earth’s magnetic field is exactly vertical. As the compass needle is free to rotate in a horizontal plane only, it may point out in any direction. ii....
2 Answers 1 views
If E and B are the electric and magnetic field vectors of e.m. waves, then the direction of propagation of e.m. direction of wave is along the
Correct option is: (C) \(\overset\rightarrow{E}\times\overset\rightarrow{B}\)
2 Answers 1 views
The direction of friction and the direction of motion are always
Correct option is B) opposite
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Global warming is a serious issue which we are facing now. Which of the following gas is
Answer is (D) CO2
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The lines drawn in north- south direction in the toposheets are the Eastings. Why are these lines called so?
The value of these lines increases eastwards.
2 Answers 1 views
Mrs. Laxmi is working as the Human Resource Consultant in a firm manufacturing cosmetic, which is facing a problem of high employee turnover. The CEO
Co-partnership/Stock option (Financial incentive)
2 Answers 2 views
Assertion: Magnetic moment is a vector quantity, whose direction inside the magnet is, from South to North. Reason: Magnetic lines of force emanate fr
Correct Answer - A Both, the assertion and reason are true and the latter is correct explanation of the former.
2 Answers 3 views