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Work, Energy and Power · Question 62

AIPMT 2000MCQEasy📈 Topic in 12% papers+4−1
1

A man is slipping on a frictionless inclined plane and a bag falls down from the same height. Then the velocity of both is related as

  1. vB > vm
  2. vB < vm
  3. vB = vm
  4. vB and vm can't be related

Answer

(3) vB = vm

Solution

No friction acts, so mechanical energy is conserved for both.

mgh = 12mv2

v = 2gh for both the man and the bag (same height h)

vB = vm

Answer: (3)

AIPMT 2000

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2

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
AIPMT 2000
3

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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