find the momentum of a body of mass 100 gram having a kinetic energy of 20 joules
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m = 100 grams = 0.1 kg
kinetic energy = 20 joules
20 = 1/2 × m × v²
v² = 40/0.1
v² = 400
v = 20 m/s
momentum = mv
= 0.1 ×20
= 2 kg m/s
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