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Questions and Answers
What does Eq.(7.11) state?
What does Eq.(7.11) state?
- The sum of all external forces acting on a system of particles is equal to zero
- The centre of mass of a system of particles moves as if all the mass of the system was concentrated at the centre of mass (correct)
- The centre of mass of a system of particles does not move
- The sum of all internal forces acting on a system of particles
What does A (= dV / dt ) represent in Eq.(7.9)?
What does A (= dV / dt ) represent in Eq.(7.9)?
- Force acting on the first particle
- Acceleration of the first particle
- Acceleration of the centre of mass of the system (correct)
- Sum of all external forces acting on the particles
According to Newton’s second law, what is F1 in terms of m1 and a1?
According to Newton’s second law, what is F1 in terms of m1 and a1?
- $F1 = m1a1$ (correct)
- $F1 = m1+a1$
- $F1 = m1-a1$
- $F1 = m1/a1$
What do we need to know in order to determine the motion of the centre of mass?
What do we need to know in order to determine the motion of the centre of mass?
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What does Eq.(7.8) differentiate with respect to time?
What does Eq.(7.8) differentiate with respect to time?
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What does Fext represent in Eq.(7.11)?
What does Fext represent in Eq.(7.11)?
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What is the acceleration of the first particle denoted by in Eq.(7.9)?
What is the acceleration of the first particle denoted by in Eq.(7.9)?
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In Eq.(7.10), what does MA represent?
In Eq.(7.10), what does MA represent?
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What does Eq.(7.11) state about the motion of the centre of mass?
What does Eq.(7.11) state about the motion of the centre of mass?
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What does A represent in Eq.(7.9)?
What does A represent in Eq.(7.9)?
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