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Work, Energy and Power · Question 63

AIPMT 2000MCQEasy📈 Topic in 38% papers+4−1
1

If F = (60 i + 15 j - 3 k) N and v = (2 i - 4 j + 5 k) m/s, then instantaneous power is

  1. 195 watt
  2. 45 watt
  3. 75 watt
  4. 100 watt

Answer

(2) 45 watt

Solution

P = F v

= (60)(2) + (15)(-4) + (-3)(5)

= 120 - 60 - 15

= 45 W

Answer: (2)

AIPMT 2000

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2

As shown in the figure at point O a mass is performing vertical circular motion. The average velocity of the particle is increased, then at which point will the string break [figure]

  1. A
  2. B
  3. C
  4. D
AIPMT 2000

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