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Laws of Motion · Question 70

AIPMT 2000MCQEasy📈 Topic in 25% papers+4−1
1

Two masses as shown in the figure are suspended from a massless pulley. The acceleration of the system when masses are left free is [figure]

  1. 2g3
  2. g3
  3. g9
  4. g7

Answer

(2) g3

Solution

For two masses over a light pulley:

a = (m2 - m1)gm1 + m2

= (10 - 5)g10 + 5

= g3

Answer: (2)

AIPMT 2000

Keep practising — Laws of Motion

2

A mass of 1 kg is thrown up with a velocity of 100 m/s. After 5 seconds, it explodes into two parts. One part of mass 400 g comes down with a velocity 25 m/s. The velocity of other part is (Take g = 10 m s-2)

  1. 40 m/s
  2. 50 m/s
  3. 100 m/s
  4. 60 m/s
AIPMT 2000

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