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A force acting on an object …

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A force acting on an object of mass 500gm changes its speed from 200cms-2 to 0.2ms-1 . The changes in momentum is :
  • 2 answers

Ranjan Satpathy 4 years, 4 months ago

Change in momentum=Final momentum (mv) -initial momentum (mu)

Gaurav Seth 4 years, 4 months ago

# Given -

m = 500 g = 0.5 kg

u = 200 cm/s = 2 m/s

v = 0.2 m/s

 

# Solution -

Initial momentum of the object is -

pi = m.u

pi = 0.5 × 2

pi = 1 kgm/s

 

Final momentum of the object is -

pf = m.v

pf = 0.5 × 0.2

pf = 0.1 kgm/s

 

Change in momentum is calculated by -

∆p = pf - pi

∆p = 0.1 - 1

∆p = -0.9 kgm/s

 

Hence, change in momentum of object is -0.9 kgm/s.

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