Question

question 6 (1 point)
if the momentum of an object changes and its mass remains constant
a it is having a change in the kinetic energy
b its velocity is changing
c theres a net force acting on it
d all answers are correct

Explanation:

• For option a: Kinetic energy formula is \(K = \frac{1}{2}mv^{2}\), and momentum formula is \(p=mv\). If \(m\) is constant and \(p\) changes (\(p = mv\), so \(v\) changes), then \(K=\frac{p^{2}}{2m}\) (since \(v=\frac{p}{m}\)), so \(K\) changes.
• For option b: Momentum \(p = mv\), if \(m=\text{constant}\) and \(p\) changes, from \(p = mv\), we can solve for \(v=\frac{p}{m}\), so \(v\) must change.
• For option c: According to Newton's second law in terms of momentum \(\vec{F}_{net}=\frac{\Delta\vec{p}}{\Delta t}\). If \(\Delta\vec{p}

eq0\) (momentum changes), then \(\vec{F}_{net}
eq0\) (there is a net - force).

Answer:

d. All answers are correct