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Work, Energy and Power · Question 61

AIPMT 2001MCQEasy📈 Topic in 12% papers+4−1
1

Two springs A and B having spring constant KA and KB (KA = 2KB) are stretched by applying force of equal magnitude. If energy stored in spring A is EA, then energy stored in B will be

  1. 2EA
  2. EA4
  3. EA2
  4. 4EA

Answer

(1) 2EA

Solution

Same force F: extension x = FK

E = 12Kx2 = F22K, i.e. E 1K

EBEA = KAKB = 2

EB = 2EA

Answer: (1)

AIPMT 2001

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2

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
AIPMT 2000
3

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
4

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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