Question detail
A 3 kg object explodes into two pieces. One piece has a mass of 1 kg and moves at a velocity of 4 m/s. Calculate the velocity of the second piece Explain your answer using Momentum and conservation of momentum (HT only) and momentum.
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At a glance
Question
Type
exam_style
Style
Topic
Momentum
Question
A 3 kg object explodes into two pieces. One piece has a mass of 1 kg and moves at a velocity of 4 m/s. Calculate the velocity of the second piece Explain your answer using Momentum and conservation of momentum (HT only) and momentum.
Answer
The velocity of the second piece is -2 m/s.
Explanation
A strong answer should address (HT only) Apply conservation of momentum to simple explosions in one dimension directly. Use the context of Momentum and conservation of momentum (HT only) within Momentum, then state the relevant forces or motion reasoning with units where needed. The answer is correct when it names the key physics quantity, keeps moment and force distinct, and links the conclusion back to the approved learning objective.
Common mistake
Confusing Momentum with Kinetic Energy
Students often confuse momentum with kinetic energy, thinking they are the same concept.
Remember that momentum is defined as mass multiplied by velocity (p = mv), while kinetic energy is given by the formula Ek = 0.5 x m x v^2. Focus on the definitions and units of each quantity.
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